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Questions tagged [hearing]

Hearing is the ability to perceive sound by detecting vibrations through an organ such as the ear.

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What causes “ear rumbling”?

The video Ear rumbling happens below the range of human hearing demonstrates that the "ear rumbling" sound is actual sound and can be recorded by a sensitive microphone near the ear. What is it ...
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1answer
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How far does eardrum move?

Sound waves move human eardrum back and forth, like the peak to peak excursion of speaker driver, how much is it though? Ofcourse this movement depends on sound pressure, frequency and even location ...
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Can a brain process auditory signals at 18 weeks of human development?

According to When a fetus hear , When a baby can hear in the womb and several other similar articles at week 18th a baby starts to hear sound. And according to How hearing works. Hearing involves ...
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25 views

How are sound waves amplified while traveling within the cochlea?

How are sound waves amplified while traveling from the basal membrane to apical membrane within the cochlea? Are they amplified by the movement of the stapes?
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1answer
58 views

Could one hear without his ear?

Might be a stupid question, but I'm quite curious about finding out ^^ If someone looses his ear, or for example cuts it of, just as Van Gogh did. Would he still be able to hear, since the actual ...
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1answer
80 views

Volley theory and sound amplitude/power

Assume a pure tone (single frequency) is listen, lets say 2 kHz. If I understand correctly the temporal theory (aka timing theory), in a cochlea neuron the action potentials create a signal that will ...
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1answer
49 views

What is the signal conversion from hair cells to cochlear nerve cells?

If I understood correctly, inner hair cells generates a graded potential (receptor potential), this potential maps the stereocilia deflection. On the other hand, the cochlear nerve cells transmit ...
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29 views

Are mosquitoes actually louder than similar flying insects, or have we evolved to hear them?

I've come across many flying insects smaller than the common housefly, but (anecdotally) the only such species that I can hear from an appreciable distance away is the mosquito, with its distinctive ...
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Why don't we hear all the processes in our body and what prevents us from doing so?

Why don't we hear all the processes in our body (like the rushing of our bloodcells through our arteries, the pumping of our heart, the electricity of neurotransmitters or our brain cells, etc.) Is ...
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Sound volume drop when falling asleep in an airplane

Note: This question has nothing to do with pressure change. When I'm flying in an aircraft at cruising altitude, the monotonous sound often lulls me to sleep. I've noticed that just as I am on the ...
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1answer
44 views

Pitch perception - why is the missing fundamental not directly detected in the cochlea?

I'm learning about pitch perception, and learned about the case of the missing fundamental. In the main image in that wikipedia page, it seems like the bottom graph, with the fundamental frequency ...
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1answer
81 views

Is the masking effect of sound related to action potentials or to mechanical aspects of hearing?

I am an applied mathematics / signal processing engineer who wants to learn more and I have a question that has been bugging me for some time. It is known in audio coding circles that human hearing is ...
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1answer
150 views

When did the mammalian outer ear evolve?

All Eutheria and Metatheria have outer ears, and as far as I found out, monotremes once also had them, so they seem to be universal for mammals. Did other synapsids have them, too? I know that soft ...
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1answer
152 views

What happens when I pop my ears?

What happens when my ears are popped? I understand it increases the air inside there which makes my volume louder, what happens after that, do my ears gradually readjust back to the air pressure that ...
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1answer
108 views

Is it the theory of the 5 senses obsolete? [closed]

An enigmatic topic in traditional science was labelled as the mystery of the 5 senses, and how to best group senses by type. Is that theory now meaningless? Do Scientists still agree that that ...
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Validity of Acoustic Weapon Effects on Biological Organisms?

There is alot of rather contradictory information present on the biological effects of acoustic weapons with a bevy of scientific articles claiming that they cause harm to biological organisms with ...
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1answer
279 views

Why are the neurites from hair cells to spiral ganglion cells called axons?

In Kandel's Principles of Neural Science I found the following figure which shows the innervation of the organ of Corti: From the legend to this figure (30-10, p. 602): "The great majority of ...
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1answer
81 views

How does the human ear guess the direction of the source? [duplicate]

Suppose a sound is produced behind you. You can easily tell that the sound came from behind. Our ear lobes face towards the front and hence traps the sound waves which come from the front. Yet, we ...
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665 views

What happens to the human ear as it naturally goes deaf?

I was always told that when the human ear goes deaf to a specific sound (auditory frequency), then that sound is heard one last time, and upon fading away, will never be able to be heard again. Is ...
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Empty room, Room full with stuffs & Auditory adaptation to reflection of sounds

Background When a room is full with stuffs like furniture, electronic utilities, books etc. it's hard to hear reflections of sounds made by us (talking, playing an instrument, sound from falling ...
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1answer
85 views

How can humans hear low frequency sounds using the cochlea which is tiny compared to wavelength?

Humans can reportedly hear sounds as low as 31 Hz. If we consider the speed of sound in air to be 1125 feet per second, then a sound at 31 Hz will have a wavelength of about 36 feet. Normally, to ...
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358 views

Curved membrane effect

Curved Membrane effect: Movements of the tympanic membrane are more at the periphery than at the centre where malleus is attached which provides some leverage. This is called as curved membrane ...
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Why is it that I can understand speech through one ear better than the other ear?

First, I do a lot of music so I'm used to pick up details in sound and I have had hearing tests showing that my ears are quite well balanced, for my age, without any dead spots. When I am in a social ...
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What are the effects on hearing of in ear headphones?

I have been told many times by my teachers and grandparents that using in ear headphones will ruin my hearing, but I was unsure of these claims. So of course I turned to stack exchange to help me. So ...
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Does the cactus wren use a call to elicit insect prey movement and detection?

I will be referring primarily to a 2013 paper, If a bird flies in the forest, does an insect hear it?, and my own investigation. Bird flight sound frequencies overlap with the hearing range of most ...
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2answers
228 views

In what range do humans generally interpret sound best?

I am currently working on a speech recognition frameworks. A generally used feature used in speech recognition are MFCC features, which uses the mel scale to extract features with. The mel scale ...
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135 views

What is the term for awareness of or inclusion of real sounds within a dream?

I fell asleep while listening to a podcast, and I am sure I was dreaming but I could also still hear the podcast. The podcast played an important role in the dream, I was searching for the source of ...
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1answer
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Does size correlate with sensory abilities?

On average, do smaller animals have senses inferior to those of bigger animals? I ask because it seems like a somewhat logical assumption: smaller eyes would in theory collect less light, and smaller ...
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260 views

High frequency tone/ringing in movies/music and its effects [closed]

I was watching a horror movie and I noticed during a scene that there was a high pitched noise playing in the background. It had been playing for a while before I noticed it and when I took notice it ...
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2answers
105 views

Why do I hear beatings with stereo headphones?

When I play a sine wave together with another pitch shifted sine wave I hear the beating very clearly. This is the expected physical phenomenon. When I use headphones to play the lower frequency ...
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1answer
493 views

Why do oviparous animals not have ears?

I was chatting with my friend, and we both found that there's a relation between putting eggs and ears; we count animals and we found that if an animal is oviparous (birds, snakes, etc.), then it does ...
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1answer
386 views

How much does hearing deteriorate with age?

For the average person, what is the lowest volume of a pure tone at each frequency they can hear as a function of age? I know some people lose hearing faster than other people, because they are ...
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2answers
3k views

What is the purpose of the incus?

The three bones in the middle ear -- the malleus, the incus, and the stapes-- play a role in transmitting sound waves to the inner ear (the cochlea). I understand that the malleus is the bone closest ...
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310 views

Is brain plasticity such that we can train ourself to see with our ears?

I am finishing writing some code which will parse a photo (eventually video) and use all the RGB information to synthesize an audio representation. I am wondering whether a typical person has ...
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Why don't we hear ultrasonic sounds as aliased versions of the original signals?

The upper limit of hearing is approximately 15 kHz, dependent on age and other factors. According to the principles of digital signal-processing, such an upper limit would mean that the auditory ...
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How we can localize sound vertically (up-down) and front-to-back?

It is quite simple to understand the concept of lateral localization of sound. It depends upon the loudness and time (and wave phase) difference between 2 ears. But how can we detect front-back ...
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1answer
6k views

Why is the human ear most sensitive to 4000 Hz tones?

Human hearing sensitivity is dependent on frequency, which can be visualized by equal-loudness (iso-loudness) contour plots. An example is given below (Taken from here). This plot shows that a tone ...
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Potentials between endolymph/cytoplasm and endolymph/perilymph

I am studying for an exam and there is something I can't seem to understand. My textbook says that the endolymph contains 150mM potassium, 2mM Na+ and 130mM Cl-. The perilymph contains 5mM potassium, ...
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Pitch perception

I am a Physics student who also love music and learned a little bit about Medical Physics. I know that the Basilar membrane in the cochlear duct enables us to distinguish different frequencies. The ...
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2answers
1k views

What causes the tonotopic organization of the inner ear?

I'm trying to understand why tones are registered in the way that they are in the inner ear, i.e., why are high pitched sounds sensed at the base of the cochlea and low frequencies in the apex? I've ...
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What is the exact percentage of spectral changes that human pinnae introduces into the acoustic input signal?

I read somewhere that amount of spectral changes that human auricula introduces into the input signal is 6%. Now I cannot find that literature. Does anyone know a source that might confirm this, or ...
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1answer
303 views

Short dated spontaneous ringing in ear [closed]

What causes very high pitched sound in one's ear?
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1answer
235 views

How can binaural beats change mental state?

Can anyone tell me how binaural beats of 10 Hz can cause a person to calm down and one of 40 Hz to cause someone to heighten their attention. All I know is that they work on the principal of Brainwave ...
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2answers
325 views

Can somebody be deaf to voices of some people only?

The voice of females is generally of high frequency, while that of males is generally of low frequency. Also, as we age, we gradually keep losing the ability of hearing sounds of high frequencies. ...
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1answer
5k views

How does waking up from an alarm clock work?

During sleep, one's brain is shut down. All it can do is to see some dreams from the semi-conscious mind. Then how does it hear when the alarm clock rings?
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865 views

Why do we like music?

Music is, of course, just a sequence of sounds. Sounds are vibrations in the air, which our ears detect. So why do we find certain sequences of sounds to be appealing? What makes us want to hear these ...
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2answers
4k views

Depolarization and hyperpolarization in stereocilia of the inner ear

It’s a well mentioned fact that when the stereocilia of the cochlear hair cells bend in one direction, the hair cell depolarizes, and when the stereocilia bend in the other direction, the cell ...
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1answer
2k views

Does loud music affect hearing and balance?

From many sources I understand that strong disturbances can destroy hair cells in the cochlea. Does the sound damage always counts simply as the number of decibels recieved by the ear? E.g., if you ...
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1answer
34k views

Is the ringing sound in the ears caused by dying ear cells?

I was recently watching the movie "Children of Men" (great movie) by Alfonso Cuarón. Now in a certain scene, the lead actor happens to be nearby a loud explosion. Later, when he complains about the '...
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Pitch shift in hearing after wisdom teeth removal

Yesterday I had my wisdom teeth removed. This morning, when I heard our phone ringing, it sounded a little lower-pitched than usual (I have perfect pitch). Sure enough, when I opened FL Studio (music-...