Raymond Yau wrote: >> Yes about that. I always wondered how they come up with 96dB ? >> >> A perceived doubling of volume is normally assumed to be +3dB, >> (log_10(2)=0.3) which means that if you have 16 bit audio you have 16 >> 'doublings', or in essence only 48 dB. Even worse, since the last bit is >> a sign bit, you essentially can only achieve a dynamic range of 45dB ! >> >> Now, I know this is off topic, but I never heard any good explanation >> why CD audio is suddenly 45 dB ? If anybody knows, please share your >> thoughts ! >> > http://en.wikipedia.org/wiki/Decibel > > When referring to measurements of amplitude it is usual to consider the > ratio of the squares of *A*1 (measured amplitude) and *A*0 (reference > amplitude). This is because in most applications power is proportional to > the square of amplitude, > > in electrical circuit , dissipated power is typically proportional to the > square of voltage or current > Okay, that would then only make for a factor two. Instead of 45dB one gets 90dB, this is still not 96dB as ordinarily claimed ? Wkr, Werner,- -- http://werner.yellowcouch.org/
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