Taperssection.com

Gear / Technical Help => Microphones & Setup => Topic started by: blu666z on November 07, 2003, 07:57:35 PM

Title: Testing my MK012
Post by: blu666z on November 07, 2003, 07:57:35 PM

Got the GC pair.  Unmatched.  I'd like to see just how far off they are.  How would I got about that?  I was thinking just playing the same sample through my stereo.  Once for each mic, not touching levels and running both through the same channel.  Put them in Cool Edit pro and compare them.  Seen some people mention pink noise.  What exactly is that?

-Kevin

Title: Re:Testing my MK012
Post by: Chuck on November 07, 2003, 08:04:30 PM

In Cool Edit go to:
Generate> Noise> 44.1/16bit> Pink noise
Make a CD and use it to make the recording.

Pink Noise= noise at all frequency's equally

Title: Re:Testing my MK012
Post by: blu666z on November 07, 2003, 08:56:07 PM

What should I be comparing in the test?  Mainly levels or frequency somehow?

-Kevin

Title: Re:Testing my MK012
Post by: Tim on November 07, 2003, 09:06:26 PM

http://www.taperssection.com/yabbse/index.php?board=23;action=display;threadid=9067;start=msg106513#msg106513

Title: Re:Testing my MK012
Post by: blu666z on November 07, 2003, 09:09:04 PM

Sweet.  Overlooked that one somehow.

-Kevin

Title: Re:Testing my MK012
Post by: dklein on November 08, 2003, 02:09:21 AM

Since we're on the subject, what is the logic behind pink (or white for that matter) noise?
Is it for getting a general fix on sensitivity.  Or is it for frequency response?  I was thinking a sweep that covers the spectrum.   Amplitude would be easy to see over the range.

So proper matching involves both output level and frequency characteristics.  Is there anything else?

Title: Re:Testing my MK012
Post by: joeshambro on November 20, 2003, 03:02:26 AM

White noise is considered random noise;  it contains all of the elements that other "color" noises have.  It has equal energy at all frequencies.  Dithering makes use of white noise;  it's used in lots of musical effects, etc.

Pink noise is logarithmic (and thus more pleasing to the sense of hearing), vs. the completely random nature of white noise.  Pink noise, in theory, is just white noise through filters.  Pink noise's spectrum level is measured down 3db every octave whereas white noise increases 3db.  Pink noise, when measured with a real-time EQ at 1/3-octave, will produce a flat response.

In testing mics and any audio equipment, pink noise is more approximate of the frequency characteristics that are pleasing to the human sense of hearing, thus better for EQ'ing systems.

Title: Re:Testing my MK012
Post by: chuckcage on November 21, 2003, 11:34:50 AM

Kevin, I'd be interested in hearing about your results with your GC pair!

Chuck

Title: Re:Testing my MK012
Post by: jpschust on November 24, 2003, 01:35:16 AM

i suggest the yamaha sound reinforcement book for more on white and pink noise