#1 03-12-2007 15:21:41

kenji
Member
Registered: 27-11-2007
Posts: 43

ultrasonic tinnitus

what effect does the ability to sense tinnitus above 20khz have on us?

we can hear tinnitus but it also correlates to changes in the brain and can be detected. Therefore would it not be reasonable to ask this?

Furthermore it is often said that there is no place in the basilar membrane for resonance to occur >20khz however is it known whether the capacity to still sense ultrasonic frequencies exists?

Offline

 

#2 04-12-2007 18:10:01

Thomas
Administrator
Registered: 28-08-2007
Posts: 1421
Website

Re: ultrasonic tinnitus

Ultrasonic frequencies are by definition those that you can't hear, so nobody would ever by aware of tinnitus in the ultrasound range.

Thomas

Offline

 

#3 05-12-2007 14:37:59

kenji
Member
Registered: 27-11-2007
Posts: 43

Re: ultrasonic tinnitus

tinnitus is not merely a sound perceived in the brain. But it is some change in the brain and tinnitus perception causes measurable activity in parts of the brain.

we are used to only hearing 20-20khz and are physically capable of hearing upto 20khz or perhaps abit more. however, that is according to the mechanism of the outer, middle, inner ear but not necessarily further up to the hearing nerve . It is said that the saccule may play a part in enabling such high frequencies to be heard, but even if there is no place where such vibrations can exist, how do we know whether or not further up, the hearing nerve may be able to transmit and enable us to perceive such high ''frequencies''?

Offline

 

#4 05-12-2007 19:22:17

Thomas
Administrator
Registered: 28-08-2007
Posts: 1421
Website

Re: ultrasonic tinnitus

I am sure if you would somehow feed ultrasound into the brain often enough, it would eventually be able to interpret this as well (i.e. we would be able to 'hear' it). But this would be a new stage of evolution then, and take correspondingly long.

Thomas

Offline

 

Board footer

Based on PunBB 1.2.19