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I think the web site in question answers this -- thehttps://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
dB scale is
comparative, and on audio equipment it is used to
compare signal
strength with some reference value, not the
threshold of hearing. A
negative value just means that particular signal is
a fraction of the
reference value.
On Apr 25, 2006, at 9:21 AM, Anthony Lapinski wrote:
Interesting web site.systems (with digital
I have a related question. Why do some stereo
displays) show negative decibel readings? Thisseems to contradict the
fact that the threshold of hearing is defined as 0dB.
tap-l@lists.ncsu.edu writes:
...
http://www.phys.unsw.edu.au/~jw/dB.html
---
Michael Porter
Colonel By Secondary School
Ottawa, Ontario, Canada
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Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu