You mean a sound pressure meter (SPL) like these, some are quite cheap new,
Your Search Results | CPC
Anything over 95 to 100 db is "loud" for a domestic system... 150 db... that's like standing a couple of meters from a jet engine with the afterburners on... and you would be deaf
Your Search Results | CPC
Anything over 95 to 100 db is "loud" for a domestic system... 150 db... that's like standing a couple of meters from a jet engine with the afterburners on... and you would be deaf
Are you talking about sound pressure? In which case dBA is a common ratio.
I really think you should look up the meaning and relevance of your question:
Sound pressure - Wikipedia, the free encyclopedia
Or in simpler terms:
About Decibels (dB)
Then think about the value you have asked for...
I really think you should look up the meaning and relevance of your question:
Sound pressure - Wikipedia, the free encyclopedia
Or in simpler terms:
About Decibels (dB)
Then think about the value you have asked for...
If you hit 145 dB, don't worry, you are probably half deaf already. 135 dB peaks is enough to cause irreversible damage with half an hour. ( Please refer to the OSHA site) Just because you can jump off a cliff, does not mean you need to.
I believe they use calibrated instrumentation mics at the competitions. They cost more than your stereo and car but together. But if you must, just back off a few feet using a generic cheap SPL meter and do the math.
I believe they use calibrated instrumentation mics at the competitions. They cost more than your stereo and car but together. But if you must, just back off a few feet using a generic cheap SPL meter and do the math.
Low frequencies are much less harmful than 1 kHz. The weighting curves reflect that. Otherwise you'd be deaf from a slammed car door or swimming underwater.
Some strain gauge pressure sensors can be used as microphones up to very high SPLs. I remember reading that in a Sensym application guide. 150 dB SPL is only about 0.1 PSI. 170 dB is about 1 psi.
If you have one lying around, try the sensor from a barometer or altimeter, a MAP sensor from a car EFI system, or one salvaged from some medical instrument.
Some strain gauge pressure sensors can be used as microphones up to very high SPLs. I remember reading that in a Sensym application guide. 150 dB SPL is only about 0.1 PSI. 170 dB is about 1 psi.
If you have one lying around, try the sensor from a barometer or altimeter, a MAP sensor from a car EFI system, or one salvaged from some medical instrument.
The Termlab sensor retails for $650...Termpro, db drag racing, spl meter, spl car audio, loudspeaker systems, wayne harris. So not cheap, but not B&K prices either
The TL is the only SPL sensor worth buying for this application, IMO. You might be able to find one used from a place like Car Audio at CarAudio.com or on Termpro's SPL forum.
I also need to buy an SPL meter
Good day to all
I am refreshing this thread by placing my needs. Here we go:
The standard Radio Shack SPL meters, both - analog and digital, have served well till today. However, as we all know, they cannot measure SPL of low frequencies (well, the specs speak for a FR of 32-8000 Hz at C weighting and 500-10000 Hz at A weighting, but these are the theoretical two end limits) and at very low levels. As far the lowest level, these meters start their measurement range from the 60 dB point, which in some cases is much more than the required.
I am therefore looking for a meter that can go down to 25 or even 20 Hz and that can have a starting point from 40 or even 30 dB. Is there anything like this? Is it costly?
Thanks
-
Good day to all
I am refreshing this thread by placing my needs. Here we go:
The standard Radio Shack SPL meters, both - analog and digital, have served well till today. However, as we all know, they cannot measure SPL of low frequencies (well, the specs speak for a FR of 32-8000 Hz at C weighting and 500-10000 Hz at A weighting, but these are the theoretical two end limits) and at very low levels. As far the lowest level, these meters start their measurement range from the 60 dB point, which in some cases is much more than the required.
I am therefore looking for a meter that can go down to 25 or even 20 Hz and that can have a starting point from 40 or even 30 dB. Is there anything like this? Is it costly?
Thanks
-
Thanks!
Thank you, xmo, for the info. Do you know if they ship it worlwide?
Should I ask them directly?
P.S.:
I just saw their price (400,000 Yen)! Awfully expensive and it will be more, if you calculate shipment cost and customs clearance.
Apparently, I need to see for something more affordable. Thanks, anyway
Panagiotis
-
Thank you, xmo, for the info. Do you know if they ship it worlwide?
Should I ask them directly?
P.S.:
I just saw their price (400,000 Yen)! Awfully expensive and it will be more, if you calculate shipment cost and customs clearance.
Apparently, I need to see for something more affordable. Thanks, anyway
Panagiotis
-
Last edited:
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