Re: Critical bands v hearing loss

[Reinhart Frosch <reinifrosch@xxxxxxxxxx>]

Hello !

As probably most List members know, the normal just noticable frequency 
difference between two consecutive 70 dB sine tones in the range 
from 0.5 to 3 kHz is about 5 cents (i.e., about 0.3 percent).

The critical band width between 0.5 and 5 kHz is about 300 cents.

Reinhart Frosch.

>-- Original-Nachricht --
>Date:         Thu, 22 Sep 2005 01:04:59 -0500
>Reply-To: Vinay SN <vinaysn@xxxxxxxxx>
>From: Vinay SN <vinaysn@xxxxxxxxx>
>Subject: Re: Critical bands v hearing loss
>To: AUDITORY@xxxxxxxxxxxxxxx
>
>Dear list,
>
>The human ear can only make sense of one signal per critical band. For
>example, if two sine tones of 100Hz and 110Hz are played, two distinct
>tones are not heard. This is because the critical bandwidth at 100Hz is
>about 80Hz, and the two tones would be within the same critical band; one
>will only hear two distinct tones when the two excitations exist in
>separate critical bands. Hence there is no point in having controllable
>bands which are finer in resolution  than a critical band.
>
>Vinay S.N (M.Phil, M.Sc)
>
>Doctoral Student in Audiology,
>
>AIISH, Mysore - 6.
>
>  ----- Original Message -----
>  From: "Richard H."
>  To: AUDITORY@xxxxxxxxxxxxxxx
>  Subject: Critical bands v hearing loss
>  Date: Wed, 21 Sep 2005 15:14:00 +0100
>
>Hi, In hearing aids & similar band-based audio processors, is there
>likely to be any point in having controllable bands which are finer in
>resolution  than a critical band? Thanks, regards, Richard


Reinhart Frosch,
Dr. phil. nat.,
Sommerhaldenstr. 5B,
CH-5200 Brugg.
Phone: 0041 56 441 77 72.
Mobile: 0041 79 754 30 32.
E-mail: reinifrosch@xxxxxxxxxx