What type of mic to measure impulse response

gremmy · 12th May 2010

Right now, I'm using a radio shake SPL meter with a correction file that is only accurate between 20hz and MAYBE 3000hz (some would say no higher than 1000hz). Combined with REW, this is sufficient to deal with my room's modal issues and has helped me work wonders with bass traps.

Now I want to start measuring ETC. Does it do any good at all to do an ETC with this mic, or should I invest in something that is accurate to 20kHz?

And if the latter, what is recommended in the "affordable" range?

GuySonic · 12th May 2010

Likely mic inside that instrument is low cost omni, but NOT higher frequency capable 'back-electret' capsule with frequency ability to over 40,000 like Panasonic WM-61 type available from Digi-Key.

Impulse response needs meter to be set in "C" to grab peaks, and not the average settings having impluses becoming invisible.

I have lapel mics made with highly modified Panasonic capsules giving perfect flat response from 5 cycles out to ~25,000 Hz if interested in using one of these to make DIY SPL measuring instruments.

Mono Lapel Mics

SAC · 12th May 2010

For a good introduction to measurement mics, check out :

RealTraps - Measuring Microphones - Ten omni microphones compared

And if you are interested in additional models such as the Earthworks M30/BX, TEF04, TEF05, SoundFirst SF101, DPA4090, DPA 4007, Audio Toolbox, etc., PM me.

tINY · 12th May 2010

ETC - meaning what?

-tINY

12th May 2010	#1
gremmy Gear nut Joined: Jan 2010 Posts: 107 Thread Starter	What type of mic to measure impulse response Right now, I'm using a radio shake SPL meter with a correction file that is only accurate between 20hz and MAYBE 3000hz (some would say no higher than 1000hz). Combined with REW, this is sufficient to deal with my room's modal issues and has helped me work wonders with bass traps. Now I want to start measuring ETC. Does it do any good at all to do an ETC with this mic, or should I invest in something that is accurate to 20kHz? And if the latter, what is recommended in the "affordable" range?

12th May 2010	#2
GuySonic Gear nut Joined: Mar 2009 Posts: 132	Likely mic inside that instrument is low cost omni, but NOT higher frequency capable 'back-electret' capsule with frequency ability to over 40,000 like Panasonic WM-61 type available from Digi-Key. Impulse response needs meter to be set in "C" to grab peaks, and not the average settings having impluses becoming invisible. I have lapel mics made with highly modified Panasonic capsules giving perfect flat response from 5 cycles out to ~25,000 Hz if interested in using one of these to make DIY SPL measuring instruments. Mono Lapel Mics __________________ www.SonicStudios.com Stereo-Surround Microphones & Systems, Portable Deck Reviews, Recording Tips, Recordings Download Web Site

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12th May 2010	#3
SAC Registered User Joined: Dec 2009 Posts: 2,622	For a good introduction to measurement mics, check out : RealTraps - Measuring Microphones - Ten omni microphones compared And if you are interested in additional models such as the Earthworks M30/BX, TEF04, TEF05, SoundFirst SF101, DPA4090, DPA 4007, Audio Toolbox, etc., PM me.

12th May 2010	#4
tINY Gear Guru Joined: Jul 2004 Location: Orygun Posts: 10,233	ETC - meaning what? -tINY