Determining the SPL Response from a Driver !

-_nando-_ · 7th April 2006, 01:42 AM

Hi !!!

I have some drivers, including ones from my car, and I realy want to know the response curve (spl / Hz) from these drivers. Is it possible using a PC ? I have electret microphone on it... But if it's not suitable, I can buy other mic...

How people usualy measure the response from drivers?

Thanks a lot !

Hector Ruiz · 7th April 2006, 01:55 AM

First and formost, you are going to need a dead accurate calibrated microphone having a frequency response flat within +/- 1db over a wide bandwidth (typically 5Hz to 30kHz). Most sound level calibrations that I have participated in, used a laptop computer running some sort of TEF software. I would do a Google/Yahoo search using the keywords "TEF" for the software and "Earthworks" for the brand of microphone mentioned earlier. BE PREPARED FOR STICKER SHOCK. If you are just looking for ballpark measurements, Radio Shack used to sell a decent hand-held, all-in-one SPL meter in the $80 to $100 range.

-_nando-_ · 7th April 2006, 02:11 AM

Ok... Now, I already forgot the idea !

Thanks !!

Eva · 7th April 2006, 06:19 AM

There are affordable measurement microphones like Behringer ECM8000, alotugh you need some kind of phantom-power preamplifier in order to connect it to a PC.

Also, there are thousands of software packages that will produce amplitude versus frequency plots, some of them free.

7th April 2006, 01:42 AM	#1
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	Determining the SPL Response from a Driver ! Hi !!! I have some drivers, including ones from my car, and I realy want to know the response curve (spl / Hz) from these drivers. Is it possible using a PC ? I have electret microphone on it... But if it's not suitable, I can buy other mic... How people usualy measure the response from drivers? Thanks a lot !

7th April 2006, 01:55 AM	#2
Hector Ruiz diyAudio Member Join Date: Mar 2006 Location: Metairie, LA	First and formost, you are going to need a dead accurate calibrated microphone having a frequency response flat within +/- 1db over a wide bandwidth (typically 5Hz to 30kHz). Most sound level calibrations that I have participated in, used a laptop computer running some sort of TEF software. I would do a Google/Yahoo search using the keywords "TEF" for the software and "Earthworks" for the brand of microphone mentioned earlier. BE PREPARED FOR STICKER SHOCK. If you are just looking for ballpark measurements, Radio Shack used to sell a decent hand-held, all-in-one SPL meter in the $80 to $100 range. __________________ Technicraft

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7th April 2006, 02:11 AM	#3
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	Ok... Now, I already forgot the idea ! Thanks !!

7th April 2006, 06:19 AM	#4
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	There are affordable measurement microphones like Behringer ECM8000, alotugh you need some kind of phantom-power preamplifier in order to connect it to a PC. Also, there are thousands of software packages that will produce amplitude versus frequency plots, some of them free.

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