[sdiy] sound - physics and physiology

[Magnus Danielson]

From: "JH." <jhaible at debitel.net>
Subject: Re: [sdiy] sound - physics and physiology
Date: Wed, 22 Aug 2007 21:09:16 +0200
Message-ID: <000301c7e4ef$f0b970b0$0400a8c0 at jhsilent>

> The middle ear has a built-in compressor (malleus, incus, stapes providing 
> variable gain), and the inner ear and brain have additional functions to 
> control the perception of sound level, frequency-dependent even.
> Generally the dynamic range of the hearing is so large that you don't have 
> much alternative to describing it with logarithmic scales.
> 
> Also, the decay of mechanical vibrations often goes with exponential law 
> (damped oscillator: stored mechanical energy being transformed to heat via 
> friction is proportional to amplitude, resulting in exponential decay).

Let's point out that the compression depends on brain reactions and unexpected
sounds as well as large volumes when in a drunken state removes compression
needed to save hearing. So, UNEXPECTED (as in supprises) large sounds as well
as the lack of timing large sounds from beat patterns when being drunk can
result in tinitus and other permanent hearing disabilities.

I just come home drunk from the pub, and I *still* consider it serious, so then
you get how serious buissness I think this is. I never had tinitus sensations
from a concert and then I have worked in a field and been good at playing it
LOUD).

Cheers,
Magnus