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Convention Paper

Measuring Transient Structure-Borne Sound in Musical Instruments - Proposal and First Results from a Laser Intensity Measurement Setup

Authors: Mores, Robert; Thor Straten, Marcel; Selk, Andreas

AES Convention 126 · Paper 7815 · May 2009

Abstract

The proposal for this new measurement setup is motivated by curiosity in transients propagating across arched tops of violins. Understanding the impact of edge construction on transient wave reflection back to the top of a violin or on conduction into the rib requires single-shot recordings possibly without statistical processing. Signal-to-noise ratio should be high although mechanical amplitudes at distinct locations on the structure surface are in the range of a few micrometers only. In the proposed setup, the intensity of a laser beam is directly measured after passing a screen attached to the device under test. The signal-to-noise ratio achieved for one micrometer transients in single-shot recordings is significantly more than 60 dB.

Details

Published in
AES Convention 126
AES Convention
126
Paper number
7815
Publication date
May 6, 2009
Session subject
Signal Analysis, Measurements, Restoration
Affiliation
Seevetal, Germany; Hamburg University of Applied Sciences, Hamburg, Germany (See document for exact affiliation information.)
Type
Convention Paper