"Jerry Steiger" wrote in message
. ..
It's been quite a while since I stopped following this group. I stopped
being the recorder for the local youth symphony and ran out of time to
keep up with audio matters, bu now I want to build a small audio test
chamber for work. I'm hoping the good folks here can help me a bit.
We make rugged hand-held computers for outdoor use. Our products are all
water proof. One of the challenges we always have is getting good speaker
output and microphone input. Good for the speaker means easily heard and
understood in somewhat noisy environments, meaning we need something like
80-90 dB SPL output. Good for the microphone means that we can record
easily intelligible voice input. Both are at a distance of a foot or two
or three with a frequency range of about 300 to 3400 Hz.
snip
I would like to have measurements that correlate fairly well with what
the user would hear in actual use.
Jerry Steiger
Following this thread I did my 'think my own thoughts' thing before
searching out state of the art info. I thought it would be a good thing to
have a standarised intelligibility teast. The audio equivalent of the
opticians sight chart. Unsurprisingly this has already been done with such
things as the STI test and there is equipment avaiable to take corresponding
measurements. eg
http://www.rksound.co.uk/goldline/go...ucts/dsp2b.htm
an interesting link that came up was a paper that also considered listener
comfort.
http://www.acoustics.org/press/141st/stefaniw.html
David F. Cox