Re: Child's scream

["James W. Beauchamp" <j-beauch@xxxxxxxxxxxxxxxx>]

I measured my son when he was about 2 years old, when he was fond of
making a very high-pitched, high-volume whine. He generated about
100 dB at about 2 foot (0.6 m) distance. I don't think he could get
much above that level.

He continues to project very loud levels from time to time, but
thankfully at a lower pitch.

Jim Beauchamp
University of Illinois at Urbana-Champaign

Torben Poulsen wrote:
>Dear list,
>I got a question from a medical doctor asking for info about the
>'noise' level of a child's scream.
>
>She has been told that a child (age 10-11 years) should be able to
>produce a level of 140 dB over a period of 10 to 20 minutes. (Measured
>at a short distance, I believe).
>
>I'm sceptical about the numbers. I found some paper titles like
>'...Cries of Infants with "Colic".' and '... acoustic analysis of
>child laughter'. Most of them are about children up to about three
>years - and in journals which are not in our library. (A JASA paper
>has no levels, but a lot of f0's, timing, envelopes etc.)
>
>Do you happen to know about this?
>
>Torben
>
>--------------------------------
>Torben Poulsen
>Ørsted•DTU, Acoustic Technology
>Building 352, Technical University
>DK-2800 Lyngby, Denmark
>Telephone: +45 4525 3940, Fax: +45 4588 0577