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Audibility of frequency notches

To: AUDITORY@xxxxxxxxxxxxxxx
Subject: Audibility of frequency notches
From: "David I. Havelock" <david.havelock@xxxxxx>
Date: Wed, 16 Jan 2002 14:02:11 -0500
Delivery-date: Wed Jan 16 14:28:39 2002
Importance: Normal
Reply-to: "David I. Havelock" <david.havelock@xxxxxx>
Sender: AUDITORY Research in Auditory Perception <AUDITORY@xxxxxxxxxxxxxxx>

List members

A colleague here has been looking for an answer to the following question...

Consider speech with a frequency band removed, such as might be done with an
ideal notch filter. It seems that if the removed band is very narrow then
there is no perceived degradation in the speech. How wide must the removed
frequency band be before a degradation in the speech becomes  noticable?

Is the answer to this known?

David Havelock
----------------------------------
David I. Havelock
Acoustics and Signal Processing Group
Institute for Microstructural Sciences, M-36
National Research Council (Canada)
1200 Montreal Road, Ottawa, ON, K1A 0R6
david.havelock@nrc.ca
voice: (613) 993-7661   fax: (613)952-3670
45N27'16" 75E37'26"

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