Re: [Audacity-devel] HowTo: convert sample rate?

[Lynn A. <l_d...@ad...>]

> Having said that, 5kHz is a pretty low cutoff frequency from the
point
> of view of getting good speech reproduction - the ear is most
sensitive
> around 2-4kHz, so at 11025Hz the quality is no better than telephone
> quality.

From my (very limited) experience, using the 11025 sampling rate with
16kbps to get 5.5kHz frequency range is fine. AM radio quality is more
than acceptable ... the expectation is only than the voice is more or
less recognizable ... be able to tell whether the speaker is Dan
Rather, Peter Jennings, or Dan Brokaw ... but not whether they have a
cold and are speaking more "nasally" than usual.

From "About"
http://broadcastengineering.com/aps/measure/broadcasting_audio_sampling/
Telephone audio signals with a maximum frequency of about 3.4 kHz are
sampled at 8 kHz.