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Pink Noise Vs. sweeps for measurements [message #80156]

Tue, 08 July 2014 16:02

Scholl
Messages: 67
Registered: May 2009

Viscount

Hi all,

This maybe OT for this forum but I know there's good experience here.

I'm working with a Bernigher ultracurve as RTA using pink noise from a CD as source. I use this for room placement and crossover tweaking. I strive for a response that is a few DB down in the highs X curve style.

As far as a general curve is concerned is the response balance with this type of measurement comparable to a sweep? Would pink noise and an RTA lead me down a path to brighter sounding speakers?

Thanks,

Scott

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Re: Pink Noise Vs. sweeps for measurements [message #80163 is a reply to message #80156]

Wed, 09 July 2014 09:52

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

Check out this informative thread where Steve Larson describes the pros and cons for each of the most common measurement signal types:

Measurement signal types

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Re: Pink Noise Vs. sweeps for measurements [message #80164 is a reply to message #80163]

Wed, 09 July 2014 19:41

Scholl
Messages: 67
Registered: May 2009

Viscount

Like I said, OT but lots of expertise.

It would be interesting to see a frequency response plot of the same speaker in the same room with both sweep and pink noise.

Scott

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Re: Pink Noise Vs. sweeps for measurements [message #80168 is a reply to message #80164]

Thu, 10 July 2014 13:45

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

If measurement is made indoors, you'll see mostly the room (not the speaker) unless gating is used in order to ignore reflections. When gating is used, it is called a pseudo-anechoic measurement, because the influence of reflections doesn't appear in the data. You can gate some signal types, and others you can't. But frankly, all the subtleties that are exposed using various signal types would be swamped by room influence, if the measurement isn't gated to ignore reflections.

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