RE: 102dB peaks????

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RE: 102dB peaks????

Posted by BigguyinATL (M) on August 30, 2016 at 06:36:08

In Reply to: RE: WTF ???? posted by Eli Duttman on August 15, 2016 at 13:27:12:

with even typical dynamics the peak to RMS ratio of Recordings are 15-18dB. I just fired up my B&K 2270 sound analyzer and placed the microphone a meter away.... talking at a normal voice level - like a telephone call yields 91dB peak - Dropping my mouse onto its pad from 4 inches generates 101.81dB peak levels (1 meter away) This is not a snare rim hit! dropping my mouse onto the desk surface without a pad from 4 inches gives a peak level of 113.6dB! a hand clap gives me 130dB peak at 1 meter

I remember taking the sound meter to a Jazz Club (seats about 50 people) 10 years ago and measuring the concert from the back of the house. Piano topped 110dB peaks, snare topped 120dB and even the trumpet was over 105dB. Now the maximum RMS levels (A weighted) rarely topped 100dB. Live music impulsive sounds typically have a 24-30 dB crest factor (the Ratio of the Peak to the RMS values) - most (almost ALL) recordings use limiters that drop this to 15dB or so. This is the SHAME of the music and recording world.

IMO a system that can't reproduce over 112dB PEAKS risks clipping the amplifier on Dynamic music transients. I have measured 112dB peaks from my listening seat from my very inefficient MMG (83dB/watt@ 1 meter) loudspeakers driven by amplifiers that clip at about 1000 Watts. By this standard an 93dB/W@ 1 meter speaker would need a 100 Watt power amplifier.

"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius

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Follow Ups Full Thread

Topic - For a mere 7700 dollars you can have some Magnavox amps. - Michael Samra 22:17:02 08/14/16 (12)

RE: For a mere 7700 dollars you can have some Magnavox amps. - Sherwood Forest 15:10:28 08/30/16 (0)

RE: For a mere 7700 dollars you can have some Magnavox amps. - BillH 06:55:41 08/16/16 (1)

RE: For a mere 7700 dollars you can have some Magnavox amps. - mark.korda@myfairpoint.net 15:58:03 08/16/16 (0)

RE: For a mere 7700 dollars you can have some Magnavox amps. - airtime 07:24:19 08/15/16 (4)

RE: For a mere 7700 dollars you can have some Magnavox amps. - Tom Bavis 05:52:07 08/17/16 (0)

RE: For a mere 7700 dollars you can have some Magnavox amps. - Michael Samra 11:35:03 08/15/16 (2)

RE: For a mere 7700 dollars you can have some Magnavox amps. - airtime 12:45:57 08/15/16 (1)

RE: For a mere 7700 dollars you can have some Magnavox amps. - Michael Samra 23:38:21 08/15/16 (0)

"Sounds better..." - briggs 07:10:44 08/15/16 (0)

WTF ???? - vinnie2 04:06:51 08/15/16 (2)

RE: WTF ???? - Eli Duttman 13:27:12 08/15/16 (1)

RE: 102dB peaks???? - BigguyinATL 08/30/1606:36:08 08/30/16 (0)

Follow Ups

RE: 102dB peaks???? - BigguyinATL 08/30/1606:36:08 08/30/16 (0)

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