Gee... that seems like a serious difference in output volume. The 707
is kinda soft for even a dynamic type microphone cartridge. A
typical hand held performance type microphone has a sensitivity (at
1,000 Hz Open Circuit Voltage) typically like this:
Shure SM ......................-54.5 dBV/Pa (1.85 mV)
AudioTechnica AT4100..... -55 dB (1.7 mV) re 1V at 1 Pa
AKG D5.........................-52 dBV / 2.6 mV/Pa
Thus, in my estimation, the Model 707 has a moderately low sensitivity
rating. Of course, this makes it a good candidate for close talking,
which tends to be more noise canceling (more like noise rejecting)
because the volume of your voice is relatively high compared to the
volume of ambient environmental sound, and that puts our voice, but not
your fan noise, over the air.
Nonetheless, the specifications suggest the 707 has a relatively low
output volume compared to similar microphones.
--------------------------- K8JHR ------------------------------------
On 4/5/2012 3:02 PM, Rsoifer@aol.com wrote:
> the output of the 707 is -78 dB vs. -52 dB for the 706
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