The Listening Shape: A Comparative Inquiry Into Human Ears, Animal Ears, Sensory Ecology, And The Evolutionary Geometry Of Sound
The Listening Shape:
A Comparative Inquiry Into Human Ears, Animal Ears, Sensory Ecology, And The Evolutionary Geometry Of Sound
DOI: To be assigned
John Swygert
May 18, 2026
Abstract
This paper examines the external ear as a biological structure shaped by survival, communication, environmental pressure, and acoustic need. While hearing is often imagined as an internal process, the outer ear is not merely decorative anatomy. In mammals, the pinna, or auricle, helps direct sound into the ear canal and contributes to sound localization, especially through direction-dependent filtering of incoming sound. Human ears are especially interesting because they are fixed, complex, folded, asymmetrical surfaces rather than large mobile radar-like structures. Cats, dogs, bats, prey animals, and humans all reveal different evolutionary listening strategies through the shape, size, mobility, and orientation of their ears. This paper proposes that ear morphology should be understood as an acoustic record of ecological priority: what a creature needed to hear, where threats or signals came from, and how sound served survival, social life, and cognition. Particular attention is given to the human ear as a subtle acoustic interface, one that may reflect the evolutionary importance of speech, social listening, localization, vertical awareness, and environmental interpretation.
Body
I. Introduction: The Ear Is Not Just A Handle For Glasses
The human ear is strange.
It is not shaped like a cat’s ear, a dog’s ear, a horse’s ear, a bat’s ear, or the nearly invisible ear opening of many reptiles and birds. It is not a simple funnel. It is not a plain hole in the side of the head. It is a folded, ridged, curved, asymmetrical structure that looks almost too elaborate to be accidental and too practical to be ornamental.
The ear has hills, valleys, rims, bowls, ledges, and channels. It looks like a tiny acoustic landscape. It also looks, depending on mood and lighting, like someone tried to fold cartilage into a question mark and then left evolution to finish the paperwork.
But the shape matters.
The outer ear, or pinna, is a mammalian structure involved in collecting, directing, and filtering sound before that sound reaches the ear canal and eardrum. The mammalian external ear funnels sound toward the tympanic membrane through the external auditory meatus, and its form affects how sound enters the auditory system.
That means the ear is not passive. It participates.
It changes the signal.
The serious premise of this paper is simple: ear shape is a biological clue. Different kinds of ears imply different relationships with the environment. A cat’s large mobile ears, a dog’s floppy ears, a bat’s enormous directional ears, a horse’s alert swiveling ears, and a human’s fixed sculpted ears all speak to different evolutionary listening problems.
The human ear, in particular, deserves more attention. It is not the largest. It is not the most mobile. It is not the most visually dramatic. It does not swivel like a cat’s radar dish or unfold like a bat’s acoustic satellite array. Yet it is complex in a very particular way. Its folds do not appear to be random. Its curves help shape sound, and its fixed placement may be connected to a species that depends heavily on speech, social interpretation, tool use, forward-facing attention, group coordination, and subtle environmental awareness.
This paper asks why ears look the way they do.
It especially asks why human ears look like that.
II. Mammals And The Invention Of The Listening Surface
The external ear is one of the features that distinguishes mammals from many other animals. Birds, reptiles, and amphibians may hear effectively, but they generally do not possess the same kind of projecting external pinna seen in mammals. Mammals developed external ears specialized for collecting and shaping sound waves, and most mammalian ears are supported by muscles that can move the pinnae to improve acoustic capture.
This is important because the mammalian ear is not merely a hole. It is a directional surface.
A hole receives.
A pinna selects.
A pinna helps the organism determine where sound is coming from, not simply whether sound exists. This distinction matters for survival. A sound in front of the body is different from a sound behind it. A sound above is different from a sound below. A sound from a predator, prey, child, mate, rival, falling branch, or approaching vehicle has different meaning depending on location, intensity, frequency, timing, and context.
Sound is not just noise.
Sound is spatial information.
Mammalian sound localization relies on multiple cues, including differences in arrival time between the ears, differences in intensity between the ears, and spectral cues shaped by the external ears. Reviews of mammalian sound localization emphasize that pinnae alter the spectrum of a sound depending on source location, helping reduce front-back confusion and helping localize sounds in the vertical plane.
That last point is crucial.
The outer ear is not just about making sound louder. It is about helping the brain determine direction. The ear changes the sound before the brain interprets it. The shape of the ear therefore participates in spatial perception.
The ear is a biological signal processor.
And unlike a phone update, it usually improves the system.
III. Cat Ears: Mobile Radar And The Small Predator’s World
Cats are an obvious starting point because their ears are so expressive, mobile, and directional.
A cat can rotate its ears toward a sound with astonishing precision. The ears move independently. They visibly track the environment. Anyone who has watched a cat hear something invisible understands that the ears often know before the rest of the animal bothers to admit it.
This is not decorative behavior. Cat pinnae are involved in orientation and localization. Experimental work on cats has shown that prominent pinna movements accompany orientation toward auditory and visual targets, and that these movements are part of the animal’s broader orienting response. Additional work on cat sound localization and pinna-based spectral cues supports the idea that the cat’s external ear shape helps provide directional acoustic information.
The cat’s ear makes sense in the cat’s ecological world.
Cats are predators, but small predators. They are hunters, but they are not invulnerable. They need to detect prey, danger, movement, distance, and direction. A mouse in a wall, a bird in a hedge, a footstep behind the animal, a rustle in the dark—these are not abstract sounds. They are survival-relevant signals.
So the cat’s ears are large, upright, mobile, and sensitive.
They are radar dishes with attitude.
The large external ear helps collect and shape sound. The mobility helps orient the ear toward a source. The visible ear also communicates mood: alertness, fear, irritation, curiosity, aggression, and relaxation. In the cat, the ear is both acoustic instrument and social semaphore.
That dual purpose matters. Many ears are not merely hearing devices. They are also expressive surfaces. They tell other animals something about attention and emotion. In a social or semi-social species, that visible signaling can matter. The ear listens outward, but it also speaks outward.
A cat’s ear says, “I heard that.”
Sometimes it also says, “I heard that, and I have judged you.”
IV. Dog Ears: Hearing, Breeding, And The Complicated Case Of Flop
Dog ears complicate the picture because dogs show enormous variation.
Some dogs have upright pointed ears. Some have semi-pricked ears. Some have long floppy ears. Some have ears so large and soft that the animal appears to be wearing acoustic curtains.
This variation is not purely natural selection. Human breeding has strongly shaped dog morphology. Selective breeding has produced extreme differences in skull shape, body form, coat type, behavior, and ear structure. Therefore, dog ears are not a simple window into wild evolutionary pressure. They are also a record of human preference.
Still, the dog is useful because it shows how ear shape can participate in multiple functions.
An upright ear may support directional hearing and visible alertness. A floppy ear may cover the ear canal and change the way sound is collected. It may also reflect domestication-related changes in cartilage, development, and selection. In some breeds, long ears may help stir scent particles near the ground, at least in practical hunting folklore, though that claim should be handled carefully and not overstated without direct evidence.
The point is not that every dog ear shape has one clean evolutionary explanation.
The point is that ear shape can be influenced by survival, communication, domestication, human aesthetics, developmental biology, and specialized tasks all at once.
Nature writes in layers.
Human breeding scribbles in the margins.
Sometimes with crayons.
V. Bat Ears: Extreme Acoustic Architecture
Bats show what happens when hearing becomes a dominant survival technology.
Many bats depend heavily on echolocation. Their ears can be large, elaborate, and highly specialized. Their external ear structures help receive returning echoes and support spatial perception in darkness. Bats remind us that the ear can become part of an active sensing system, not merely a passive receiver.
The bat does not simply hear the world.
The bat interrogates the world with sound.
It emits sound, receives reflections, and builds a spatial map. The ear is therefore part of a dynamic loop: signal sent, signal returned, signal interpreted. This is an extreme form of acoustic intelligence. It makes the bat one of the clearest examples of morphology serving sensory ecology.
Compared with a bat, the human ear may look modest. But the comparison is useful. It shows that when sound becomes central enough to survival, external ear morphology can become highly specialized. The human ear is not bat-like because humans did not evolve primarily as nocturnal echolocators. We evolved as social, visual, tool-using, language-bearing primates who still needed to hear direction, speech, danger, and environmental events.
The bat’s ear asks, “Where is the insect?”
The human ear asks, “Who said that, where are they, what do they mean, and should I pretend I did not hear it?”
That last question may be the foundation of civilization.
VI. Animals With Minimal External Ears: When The Pinna Is Not The Point
Some animals have little or no visible external ear. Birds, reptiles, amphibians, and many aquatic or semi-aquatic animals do not have large projecting pinnae like mammals. This does not mean they cannot hear. It means their hearing systems are organized differently, shaped by different environments, body plans, and constraints.
For aquatic animals, large external ears could be a liability. They would create drag. They might interfere with movement through water. Sound transmission underwater also differs from sound in air. For birds, streamlined bodies and flight impose different constraints. For reptiles, the ear may be visible as an opening or tympanic membrane rather than an external structure.
This tells us something important: the absence of a large external ear can be just as meaningful as its presence.
A structure evolves under pressure.
It also disappears, shrinks, or fails to emerge under pressure.
If a protruding ear helps an animal, it may be favored. If it harms movement, creates vulnerability, catches water, creates drag, or serves no strong function in that ecological niche, it may remain reduced or absent.
This is why the “alien-cat” thought experiment was useful. Reduce the ears and the creature begins to look less like a small threatened mammal and more like a being whose sensory ecology has changed. That does not prove anything about aliens, but it demonstrates a valid principle.
Ear size implies a relationship with threat, environment, and signal.
Large ears suggest one world.
Small or absent ears suggest another.
VII. The Human Ear: Fixed, Folded, And Weirdly Brilliant
The human ear is not large compared with many mammals. It is not highly mobile. Most humans can barely move their ears, and those who can often treat the skill as a party trick, which is fair because civilization must preserve some mysteries.
Yet the human external ear is complex.
Its folds and ridges help shape incoming sound. Human sound localization depends partly on spectral cues created by the pinnae, head, and torso. These cues vary with the direction of the sound source and help the auditory system interpret where sound is coming from. Research on altered “new ears” has shown that changing pinna-related spectral cues disrupts localization but that humans can adapt to new spectral cues with experience, demonstrating both the importance of external-ear filtering and the brain’s plasticity.
This is extraordinary.
The human ear is not a simple receiver. It is part of a learned acoustic interface.
The ridges of the ear alter sound in direction-specific ways. The brain learns those patterns. Sound from above, below, in front, behind, or off to the side is filtered differently before reaching the eardrum. The brain uses these differences, along with timing and intensity differences between the two ears, to infer location.
So the human ear is a sculpted surface for spatial listening.
That may be why it looks so strange.
It is not trying to be pretty.
It is trying to solve geometry with cartilage.
VIII. Why Would The Human Ear Evolve This Way?
The human ear likely reflects a combination of inherited mammalian architecture and human-specific pressures.
Humans are upright, forward-facing, social, language-using primates. We rely heavily on vision, but we also depend deeply on sound. We needed to detect danger, communicate in groups, locate voices, hear infants, coordinate movement, interpret emotional tone, listen in darkness, monitor the environment while using the hands, and distinguish speech from background noise.
Unlike cats, humans do not rely on large mobile pinnae to swivel toward every faint sound. Our heads and eyes can turn. Our posture gives us a different relationship to the environment. Our social world demands constant interpretation of voices, not merely detection of prey or threat.
The human ear may therefore represent a compromise:
not huge, because humans are not nocturnal acoustic specialists like bats;
not highly mobile, because humans rely heavily on head movement, vision, and social face orientation;
not flat or absent, because air-based localization and speech perception still matter;
not simple, because vertical, front-back, and spectral filtering remain important;
not purely directional, because humans live in dense social sound fields requiring subtle interpretation.
In short, the human ear may have evolved less like a radar dish and more like a shaped acoustic interpreter.
A cat’s ear says, “Where is the mouse?”
A human ear says, “Where is the speaker, what is the tone, what is the intention, how far away is the sound, is it behind me, is it above me, and did that person just mutter something under their breath?”
This is a different listening problem.
The shape follows the problem.
IX. The Ear And Speech
Speech may be one of the major reasons human hearing became so important.
Human language is not merely a sequence of words. It includes tone, rhythm, stress, volume, timing, breath, hesitation, emotional coloring, and social context. A human listener is not only decoding sound. The listener is decoding intention.
The outer ear does not “understand” speech, but it helps deliver the acoustic signal to the auditory system in a usable way. The brain then performs the deeper interpretation. Still, the ear’s role in shaping the incoming sound matters because speech occurs in space. Voices come from locations. They compete with noise. They carry emotional cues. They must be separated from other sounds.
A group of humans around a fire, in a shelter, in a forest, on a plain, inside a crowded room, or across a work site needed to identify not just sound, but speaker.
Who called?
From where?
With what urgency?
Was that anger, fear, laughter, warning, affection, sarcasm, or the ancient human tone meaning “I told you not to do that”?
The human ear participates in the reception of these signals. Its shape may therefore be connected to the social complexity of human life. Human beings survived not only by hearing predators, but by hearing one another.
That distinction matters.
Social listening may be one of the most underappreciated evolutionary forces in human life.
X. The Ear And Vertical Awareness
The human ear also helps with vertical localization.
Determining whether a sound comes from above or below is not solved well by simple left-right timing differences alone. Spectral cues shaped by the pinna help resolve elevation and front-back confusion. Mammalian sound localization research emphasizes that pinnae provide monaural spectral cues important for vertical-plane localization and for avoiding front-back errors.
Why would that matter?
For a ground-dwelling animal, sound above can mean falling objects, climbing predators, birds, weather, branches, or environmental events. Sound below or near the ground can mean movement, water, tools, children, insects, prey, or danger. For humans living in complex terrain and later built environments, vertical awareness remained important.
The ear’s folds help the brain distinguish these differences.
This makes the ear a three-dimensional interpreter.
It does not merely ask left or right.
It asks where in space.
That spatial role may explain some of the external ear’s complexity. A smooth funnel could collect sound, but a folded surface can filter sound differently depending on angle. That filtering becomes information.
The ear is not just catching sound.
It is tagging sound with spatial clues.
XI. The Ear As A Boundary-Layer Device
The outer ear sits at a boundary.
Outside is the world: air, pressure waves, voices, animals, machines, weather, footsteps, music, warning, comfort.
Inside is the body: ear canal, eardrum, ossicles, cochlea, nerve signal, brain, interpretation, memory, meaning.
The pinna is the shaped interface between these worlds.
It is a biological boundary-layer device.
That phrase may sound dramatic, but it is accurate in principle. The outer ear is where external acoustic energy begins its transformation into internal perception. It does not complete that transformation, but it begins shaping the signal before deeper systems receive it.
This is why the ear belongs in a broader theory of signal and receiver.
Sound does not enter the mind directly. It passes through morphology. It is filtered by body shape, ear shape, head shape, tissue, direction, environment, and experience. The listener never receives “pure sound.” The listener receives sound as shaped by embodiment.
That is a powerful idea.
It means perception is not just brain activity.
Perception begins at the body’s edge.
The ear is one of those edges.
XII. Ear Shape And Emotional Meaning
Ears also communicate.
In many animals, ear position reveals attention, mood, fear, aggression, submission, curiosity, or relaxation. Cats flatten their ears when threatened or irritated. Dogs lift, pin, or shift their ears depending on alertness and emotion. Horses rotate their ears toward sounds and social targets. The ear is both receiver and display.
Humans lost most visible ear mobility, but the human ear still participates socially in subtler ways. It frames the head. It affects perceived facial balance. It supports the wearing of ornaments, cultural markers, hearing devices, communication technology, and symbolic identity. Humans may not signal with ear position the way cats do, but the ear still became culturally available.
Earrings, piercings, hearing aids, earbuds, ceremonial modifications, and even the modern anxiety of losing one wireless earbud all show that the ear remains socially meaningful.
The ear became less expressive as a moving animal signal and more available as a cultural surface.
That may be another human-specific transformation.
The cat moves the ear.
The human decorates it, plugs it, studies it, ignores it, and occasionally complains that one side of the headphones has stopped working.
XIII. The Shape Of Human Attention
The human ear may also reflect the shape of human attention.
Humans are visually dominant. Our eyes face forward. Our hands manipulate tools. Our bodies move upright through the world. We often attend to what is in front of us. Yet hearing remains omnidirectional in a way vision is not. A person can look forward while hearing behind. The ear provides environmental awareness beyond the visual field.
This is critical.
Hearing protects the blind side.
It allows the human being to remain engaged in a task while still monitoring the environment. A person can shape a tool, speak to a child, watch a fire, carry food, or scan the horizon while hearing something off to the side or behind. The ears maintain a sphere of awareness around a forward-facing creature.
This may help explain why human ears did not need to be huge rotating structures. Humans could turn the head, use vision, and coordinate socially. But the ears still needed to preserve broad environmental awareness.
A fixed ear can support a stable acoustic map.
A stable acoustic map can be learned by the brain.
This may be one advantage of the human ear’s relative immobility. If the pinna is always in roughly the same position, the brain can learn consistent filtering patterns. A cat solves some problems by moving the ear. A human solves many problems by learning the fixed ear’s filter and moving the head.
The cat has swiveling hardware.
The human has trained software.
This is not a perfect analogy, but it is a useful one.
XIV. Why Human Ears Are Not Cat Ears
The human ear did not evolve to do the same job as the cat ear.
A cat needs high-speed directional awareness for hunting and safety. It benefits from mobile ears that can orient independently. Its ear movements are part of its whole-body attention system. The ear visibly tracks the world.
Humans evolved into a different niche.
Humans became cooperative, tool-using, language-dependent, upright, highly visual, culturally complex primates. Our survival depended not only on detecting threats, but on coordinating with others. The sound of another human became as important as the sound of an animal. A spoken warning, a child’s cry, a social tone, a group call, a ritual rhythm, a song, a footstep, a tool strike, or a whispered instruction all mattered.
The human ear therefore did not need to be a giant movable radar dish.
It needed to be a reliable interface for spatial, vocal, and environmental sound.
It needed to work with the head, eyes, brain, speech, and social group.
The result is not visually dramatic in the way a cat’s ears are dramatic. But it may be more sophisticated than it appears. Its sophistication is folded into small structures rather than expressed as size.
The human ear is modest.
But modesty, in anatomy as in conversation, should not be mistaken for simplicity.
XV. The Evolutionary Logic Of Reduced Ears
The earlier alien-cat thought experiment raised a useful question: if a species no longer needed large ears for threat detection, would ears shrink?
The answer is: possibly, but not automatically.
Evolution does not remove structures simply because one imagined function decreases. Structures can have multiple functions. They can be retained because they are developmentally linked to other systems, because they serve social signaling, because they impose little cost, because sexual selection favors them, or because they remain useful for reasons other than the original pressure.
Still, reduced ears often imply changed pressure.
Animals living in water, burrows, dense cover, high-speed environments, or protected niches may not benefit from large protruding ears. Large ears can create drag, injury risk, heat exchange issues, or unnecessary exposure. Smaller or less visible external ears may indicate different environmental priorities.
This is why ear morphology is such a rich comparative subject. It cannot be reduced to one rule, but it can reveal patterns. Ear size, mobility, orientation, folding, and exposure all invite ecological interpretation.
The ear asks:
What needed to be heard?
From where?
At what distance?
At what frequency?
Under what danger?
In what medium?
By what kind of body?
That is the framework.
XVI. Frequency, Shape, And The Body As Instrument
Sound is vibration moving through a medium. Hearing is the biological interpretation of that vibration. The body is therefore part of the hearing system.
The ear shape matters because sound waves interact with physical form. The ridges, folds, and cavities of the pinna amplify and attenuate different frequencies depending on the sound’s direction. This directional filtering produces spectral cues used by the auditory system. In human listeners, altered pinna cues can disrupt localization, but the brain can adapt to new cues after experience, showing that hearing is both morphological and learned.
This means ear shape is not merely about volume.
It is about frequency shaping.
The body becomes an instrument, and the ear is part of its acoustic tuning.
This may be the deepest point in the paper. Every ear is an evolved compromise between sound capture, frequency filtering, direction finding, social signaling, thermoregulation, injury risk, mobility, body size, environment, and developmental constraint.
An ear is not just an ear.
An ear is a history of listening.
XVII. The Human Ear As Acoustic Signature
Every human ear is shaped somewhat differently.
This creates an interesting implication: each person may have an individualized acoustic interface. Head-related transfer functions, which describe how the body, head, and ears filter sound from different directions, vary among individuals. Research on localization and spectral cues recognizes the role of individualized filtering in spatial hearing.
This means each person’s auditory world is subtly shaped by that person’s own anatomy.
The world does not sound exactly the same to every body.
That sentence matters.
It applies not only to ears but to perception more broadly. Humans share a species-level hearing architecture, but individual anatomy still affects the incoming signal. The brain learns its own body’s acoustic filter. It learns how this particular ear, this particular head, this particular body receives the world.
The human ear therefore becomes part of identity in a deeper sense than appearance.
It shapes the sound field through which the person lives.
The face may be what others see.
The ear helps define how the world arrives.
XVIII. Toward A Comparative Ear Morphology Framework
A serious study of ear morphology should compare species by several factors:
external ear size;
mobility;
orientation;
fold complexity;
canal exposure;
frequency range;
ecological niche;
predator or prey status;
social communication needs;
body size;
habitat;
dominant sensory mode;
and whether the ear serves display as well as reception.
Using that framework, several broad types emerge.
The radar ear: large, mobile, directional, useful for detecting faint or spatially precise sounds.
The funnel ear: shaped to collect sound and direct it inward.
The expressive ear: used visibly in social signaling.
The reduced ear: minimized because external projection is unnecessary or costly.
The specialized acoustic ear: highly shaped for echolocation or extreme localization.
The human sculpted ear: fixed, folded, subtle, learned by the brain, adapted for spatial listening in a social, speech-heavy, visually dominant primate.
These are not rigid categories. They are interpretive tools.
But they help show that ears are not random appendages.
They are listening strategies made flesh.
XIX. Why This Matters
This topic matters because humans often underestimate morphology.
We look at body parts as objects rather than solutions. But anatomy is not a collection of parts. It is a set of solved and unsolved problems inherited through time. The ear is one of those solutions.
A cat’s ear tells the story of small-animal alertness, predatory precision, and environmental scanning.
A bat’s ear tells the story of acoustic mapping.
A dog’s ear tells the mixed story of wild ancestry, domestication, breeding, and task specialization.
A reptile’s reduced external ear tells a different body-plan story.
A human ear tells the story of a social primate that needed spatial awareness, speech reception, environmental monitoring, and a stable acoustic filter integrated with the brain.
This is why the human ear should be studied not merely as anatomy but as signal architecture.
It is a receiver.
It is a filter.
It is a boundary.
It is an interface.
It is a frequency-shaping structure.
It is a record of ecological need.
And, unfortunately for anyone trying to draw it accurately, it is also one of the most annoyingly complicated shapes on the human body.
Artists have known this for centuries.
The ear is where confidence goes to be humbled.
Conclusion
Ear shape is not accidental decoration. It is morphology shaped by survival, signal, environment, and use. Mammalian pinnae collect, direct, and filter sound. In cats, large mobile ears support orientation and environmental alertness. In bats, external ear structures can become extreme acoustic tools. In dogs, ear variation reflects both function and human-directed breeding. In animals with reduced external ears, the absence of large pinnae reflects different ecological constraints and body plans.
The human ear is especially significant because it is fixed, folded, and acoustically complex. Its structure helps shape incoming sound through direction-dependent filtering, contributing to spatial localization and the interpretation of sound in three-dimensional space. Human ears may reflect a particular evolutionary compromise: a forward-facing, visually dominant, upright, social, language-bearing primate that still required environmental awareness, speech reception, vertical localization, and subtle acoustic interpretation.
The human ear is therefore not a crude sound funnel. It is a sculpted acoustic interface.
Its form suggests that human listening evolved not merely to detect danger, but to interpret space, voice, intention, and social presence. The ear is where the outside world first becomes shaped for the inner world. It is one of the body’s great boundary devices, a living filter between vibration and meaning.
To study ears comparatively is to study how life listens.
And to study the human ear is to ask a deeper question:
What kind of world did we have to hear in order to become human?
References
Grothe, B., Pecka, M., & McAlpine, D. “Mechanisms of Sound Localization in Mammals.” Physiological Reviews, 2010.
Heffner, H. E. “The Evolution of Mammalian Sound Localization.” Acoustics Today, 2016.
Hofman, P. M., Van Riswick, J. G. A., & Van Opstal, A. J. “Relearning Sound Localization With New Ears.” Nature Neuroscience, 1998.
Manley, G. A. “Understanding the Evolution and Function of Ears.” Journal of the Association for Research in Otolaryngology, 2017.
Mozaffari, M., Jiang, D., & Tucker, A. S. “Anatomy and Development of the Mammalian External Auditory Canal: Implications for Understanding Canal Disease and Deformity.” Frontiers in Cell and Developmental Biology, 2021.
Musicant, A. D., & Butler, R. A. “The Influence of Pinnae-Based Spectral Cues on Sound Localization.” Journal of the Acoustical Society of America, 1984.
Parise, C., et al. “Happy New Ears: Rapid Adaptation to Novel Spectral Cues for Sound Localization.” iScience, 2024.
Populin, L. C., & Yin, T. C. T. “Pinna Movements of the Cat During Sound Localization.” Journal of Neuroscience, 1998.
Rice, J. J., May, B. J., Spirou, G. A., & Young, E. D. “Pinna-Based Spectral Cues for Sound Localization in Cat.” Hearing Research, 1992.
Wightman, F. L., & Kistler, D. J. “Monaural Sound Localization Revisited.” NASA Technical Report, 1997.
________________________________________________
________________________________________________
Thanks for visiting Downstream of Everything today and come back and check for our daily articles !!!
If you enjoyed what you read and studied here please visit us at our sibling website Upstream of Everything !
Also look for our other publications here...
The Swygert Theory of Everything AO
TSTOEAO.com
Please read other material from our publishing house at... which includes but is not limited to the unification theory,
" The Swygert Theory of Everything AO ". and Google us on Google Google scholar or anywhere online at this handle...
TSTOEAO
Again, find us there at " TSTOEAO " And we are on just about every platform, from SPOTIFY, Twitter, Tik Tok, Facebook, and visit our websites at... You can interact with us directly, you can listen to our incredible podcast or read our peer-reviewed articles with our over 160 published and a growing corpus.
TSTOEAO.com
and
IvoryTowerJournal.com
You would like to send us an email please do so and we would love to hear from you naturally.
tstoeao@gmail.com
Comments
Post a Comment