I managed to break my microphone preamp and I've lost the microphone... So... I bought a SPL meter with an output socket but the manual says the measurements aren't very accurate below 32Hz or about 10kHz (it was cheap BTW) so I was thinking about swapping the microphone for one of the Panasonic WM-61A microphones as I guess the mic is the problem.
The operating voltage is OK but is this likely to work? I don't care if the SPL meter on the unit is accurate as the output is calibrated on my laptop, I would just like to be able to measure from 20 to 20K fairly accurately.
The operating voltage is OK but is this likely to work? I don't care if the SPL meter on the unit is accurate as the output is calibrated on my laptop, I would just like to be able to measure from 20 to 20K fairly accurately.
quickshift said:I managed to break my microphone preamp and I've lost the microphone... So... I bought a SPL meter with an output socket but the manual says the measurements aren't very accurate below 32Hz or about 10kHz (it was cheap BTW) so I was thinking about swapping the microphone for one of the Panasonic WM-61A microphones as I guess the mic is the problem.
The operating voltage is OK but is this likely to work? I don't care if the SPL meter on the unit is accurate as the output is calibrated on my laptop, I would just like to be able to measure from 20 to 20K fairly accurately.
It should work OK.
quickshift said:I managed to break my microphone preamp and I've lost the microphone... So... I bought a SPL meter with an output socket but the manual says the measurements aren't very accurate below 32Hz or about 10kHz (it was cheap BTW) so I was thinking about swapping the microphone for one of the Panasonic WM-61A microphones as I guess the mic is the problem.
If it is a Tandy / Radio Shack meter, there is a hobbyist named Eric Wallin who did just such a thing. It took a bit more than just a microphone swap to do it. He experienced some minor problems once all the mods were made - meter pegging and such.
My stock Radio Shack SPL meter is not accurate above ~2kHz there is a big peak (5-6dB) at ~5-6kHz and it is down 15-20 dB at 20kHz. The output was rather noisy, as well.
Eric Wallin's site with RS SPL meter mods:
http://mysite.verizon.net/tammie_eric/audio/audio.html
Scott
http://mysite.verizon.net/tammie_eric/audio/audio.html
Scott
OK, thanks all
It sounds like it could be potentially complicated because I don't have a Radioshack SPL meter so nothing to work from as such.
I'll do some comparative tests before and after fitting the panasonic mic capsule - I have data from my previous setup with the decent mic and preamp I can use.
It sounds like it could be potentially complicated because I don't have a Radioshack SPL meter so nothing to work from as such.
I'll do some comparative tests before and after fitting the panasonic mic capsule - I have data from my previous setup with the decent mic and preamp I can use.
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