Klarinet Archive - Posting 000143.txt from 2002/11

From: "Mark Charette" <charette@-----.org>
Subj: RE: [kl] Tuners
Date: Sat, 2 Nov 2002 23:59:40 -0500

Perhaps someone else here does?

---
You need to read carefully. The scale is dbVrms, where 0 db references the
microphone nominal output. 0 db is just a reference level.

If you also check carefully, you will find that some even partials are at a
higher level than neighboring odd partials.

"1/2" or "3/8" are irrelevant fractions on a log scale ... the whole idea of
using decibels and log scales is to amplify small differences. A 3 db
difference mean twice the power, a 10 db difference 10 times the power. A 40
db difference (as in the 1st chart) means a 10,000 times difference.

In a different type of scenario, and extremely simplified, if a trumpet puts
out a maximum 90 db sound level and a clarinet a maximum 70 db sound level,
you'd need 100 clarinets to equal the sound level of one trumpet ...

Mark C.

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