Tag Info

Hot answers tagged

10

OK, I'll field this one. I'll ignore any of the tell-tale signs of hokum such as writing in ALL CAPS. Nevertheless, it's a lot of hokum. It's true that he goes into a lot of detail and I'm sure his math looks nice but the fact is that it's not grounded in reality. I would consider myself to be something of an expert (in training) in the field of ...


8

The Cicada A careful study of the noise-making apparatus of the cicada can be found in a 1994 paper by Young and Bennet-Clark.$^1$ The authors generated sounds at about 0-16 kHz at peaks on the order of 100 dB using cicadas in various stages of deconstruction. The cicada uses a resonant organ-system called the tymbal which buckles and unbuckles rapidly to ...


7

In this instance, I would say your attention has been adjusted, not your ear's ability to perceive sound. Our ears don't have a control setting or a means of adjusting incoming sound levels (though I'm certain when an ambulance with loud siren drives by, we all wish we did). What you are experiencing is a prioritization of the sound by your brain in ...


7

There are strong connections between the auditory cortex and the limbic system, which includes such structures as the hippocampus and the amygdala. A recent paper [1] builds on earlier notions of emotional "significance" of music without any lyrics. It adds in lyrics, so giving a perspective of which portions of the brain are reacting to which component of ...


6

There are several ways to infer into the propagation delays of auditory system in vivo that is applicable to humans (i.e. leaves the subjects intact). One of them is so-called ABR that stands for Auditory Brainstem Response. As it is clear from its name this method allows you to derive the brainstem response to an auditory stimulus (so, you can track the ...


6

Although tinnitus is usually described as a ringing in the ear, there's a whole range of tunes, buzzes, whooshing sounds, humming and hissing sounds that are described of as tinnitus. The sounds can either genuinely be there or be perceived to be there. If it is genuinely there it suggests muscles ate at play or some blood vessel disease if the sounds are in ...


5

Yes, of course they can. What happens when your ears feel 'full' like on an aeroplane is that the air pressure in the middle ear is different from the air pressure outside. When you 'pop' your ears, you push open the Eustachian tubes that connect the middle ear to the throat and make the pressure equal. No matter what the air pressure, the air still conducts ...


4

+1 for giving a solid answer to @AP, but being older I've had friends who have had tinnitus and I'd like to add some notes to try to flesh this out a bit. I don't think tinnitus is the result of nerve damage usually. Nearly everybody experiences episodic tinnitus at one point or another. When exposed to a loud sound or a blow to the head can cause it. ...


4

Misophonia Misophonia is a relatively unexplored chronic condition in which a person experiences autonomic arousal (analogous to an involuntary “fight-or-flight” response) to certain innocuous or repetitive sounds such as chewing, pen clicking, and lip smacking. Misophonics report anxiety, panic, and rage when exposed to trigger sounds, ...


4

Good question. To understand it perfectly, you'll need a good reference to a text on detailed explanation of sound conduction by the ear ossicles in reptiles and humans. I couldn't find anything better than these here and here. But these are partly inadequate in addressing your questions and are a bit involved in the physics used. But, if we leave the ...


3

The head-related transfer function. Sound coming from front, and from back differ because of the human body's asymmetry in the vertical direction where the biaural cues such as inter-aural timing and intensity differences are identical. The shape of the ear, and body is necessary for this perception, but eventually, the signal must be analyzed by the brain ...


3

This phenomenon is called Ototoxicity, which literally means "toxic for the ear". Mostly the cochlea or the auditory nerve are affected and almost all these cases are connected to medications as gentamicin or cisplatin. The reasons for this are that the cells are either driven into apoptosis or necrosis. This is caused by destroying mitochondria and ...


3

It is called a frisson, and actually, there has been a study about it, available here. The frisson is kind of the same you get from cold weather, fear, or... well, other things not suitable to discuss if not knowing how old people reading this might be. Actually, they found that this works best if you include familiarity. In their case, asking study ...


2

Yes, they can. Here are a couple pics I found of foxes moving their ears independently: This is something all canids can do (1)(2) Btw, I can move my ears independantly. It's all in the finding the right muscles.


2

intuitively, I would say that small creatures are not seen easily. therefore they need audible lighthouses to signal to others their location big creatures don't usually have this need, though some do such as whales which can emit sounds heard hundreds of kilometers away


2

Humans do not have the ability to move their outer ear in response to sound. Many animals can do that, and use it to determine the source of the sound waves. Thus, human outer ears are equipped with many "hills and valleys". It does not provide amplification (because the waves can lose their energy bouncing around the ridges), but rather gives the brain more ...


2

Music and Emotions The most difficult problem in answering the question of how music creates emotions is likely to be the fact that assignments of musical elements and emotions can never be defined clearly. The solution of this problem is the Theory of Musical Equilibration. It says that music can't convey any emotion at all, but merely volitional ...


1

Tinnitus is the perception of phantom sounds (wooshing, ringing, buzzing)...in the ear when there is no external sound present. there are many causes of tinnitus, you can see them here https://tinnitusfix.wordpress.com/2014/06/25/causes-of-tinnitus-ears-ringing


1

The cooperative functioning of the eardrum and ossicular chain attenuation can be regarded as in this schematic drawing of the ear as an externally activated spring-mass system. Fig. 2. Ossicular chain and eardrum function, together operating as a continuous sound reduction mechanism for changes in the strength of the offered signal. The tympanic membrane ...


1

The ear uses a series of hairs to parse out sound frequency in the cochlea. When the cochlear hairs die, we lose some frequency response. As we get older, even without exposure to loud noises, the higher frequency responses tend to lose their response first. But loud noises have been linked to hearing loss and high tones are often lost first. Hot off ...


1

In music, harmonies are simultaneous combination of tones or chords that are concordant. In physics, each note is actually a vibration with defined wavelenght, the concordance can be explained in mathemathical terms, for instance with regard to coincidence of phase oscillation. In physiology, the ear perceives air vibrations and send them to the brain by ...



Only top voted, non community-wiki answers of a minimum length are eligible