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,-