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19 December 2003
E-Bulletin Backscatter
John,
Interesting:
After years of adjusting audio levels and measuring them in dB, I have
always considered a 6 dB increase as twice as loud. Never gave it much
thought until now. One thing though, a 3 dB increase can be noticed but
it really is not a dramatic increase so someone would not be expected
to call this twice as loud. I seem to rememeber that 1 dB is about the
minimum someone can notice as an increase. The minimum detectable increase
level might be worth experimenting with also. It would also be interesting
to compare some other senses. Like how do we preceive twice as bright
light or twice as heavy.
The "dynamic range of hearing": from the threshold of detection to pain and distortion is more like 10^13 rather than 10^10.
Jim Hannon
SAS Members in the UK?
Hi, do you have many members in the UK that I could contact about the SAS?
Specifically, within the SAS do you have any members who are interested in Entomology especially Mosquitoes?
Any info will be appreciated.
Regards,
Martin
martin.franks@ukaea.org.uk
