Yup, I knew that. The sound energy changes by a factor of 10 for every 10 dB, and the ear perceives that as a doubling of loudness. The smallest change in sound intensity the ear can reliably discern is about 3 dB.
Rick http://photo.net/photos/RickW ----- Original Message ----- From: Larry Colen <[email protected]> To: Pentax-Discuss Mail List <[email protected]> Cc: Sent: Thursday, February 2, 2012 6:51 PM Subject: Re: OT question for electronics geeks dB is a logarithmic scale of ratios. 10 deciBell is one Bell, or a factor of 10. 3dB is a factor of two, or a stop. So if you have your camera to change settings by 1/3 stop, they change by about 1dB. Note, that depending on whether you're talking amplitude or power, 10dB could mean a factor of either 10 or 20, I never really did sort the math out on that. In the case of your new toy, I would presume that 0dB means full volume, without clipping any of the peaks that you are likely to see in normal listening. So my guess is that +15dB means pushing things into the red, in case you're playing music with less dynamic range, pure sine waves, or you don't mind a little distortion for when you just simply have to rattle your neighbor's windows. -- Larry Colen [email protected] (from dos4est) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
