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Re: going way out on a limb here... [message #17630 is a reply to message #17629]

Thu, 03 March 2005 20:13

Bill Fitzmaurice
Messages: 335
Registered: May 2009

Grand Master

You won't get a stable reading with pink noise. The best way to use it is to take a few readings and average them. You also won't get the same dB reading with pink noise as you will with swept sine, as with pink noise the power is spread across the spectrum while with swept sine power is all concentrated at one frequency at any one point in time. To derive SPL using pink noise you have to reference a single frequency within the plot to a reference SPL measured with sine at a single frequency. For a full range speaker 1kHz is the usual frequency of choice.

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[Message index]

		Measuring sensitivity By: JLapaire on Thu, 03 March 2005 12:37
		going way out on a limb here... By: wunhuanglo on Thu, 03 March 2005 16:44
		Re: going way out on a limb here... By: footstony on Thu, 03 March 2005 19:03
		Re: going way out on a limb here... By: Bill Fitzmaurice on Thu, 03 March 2005 20:13
		Re: going way out on a limb here... By: JLapaire on Mon, 07 March 2005 05:57
		Re: going way out on a limb here... By: Wayne Parham on Mon, 07 March 2005 21:11
		Reference distance By: JLapaire on Tue, 08 March 2005 05:59
		Re: Reference distance By: Bill Fitzmaurice on Tue, 08 March 2005 13:12
		Re: Measuring sensitivity By: DRC on Sun, 06 March 2005 15:59
		Re: Measuring sensitivity By: JLapaire on Mon, 07 March 2005 06:30
		Re: Measuring sensitivity By: DRC on Mon, 07 March 2005 07:08

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