ESPI (Electronic Speckle Pattern Interferometry) is a valuable tool to visualize loudspeaker vibration. Using digital image processing, numerical data can be extracted from the ESPI video signal. A method id proposed to obtain vibration amplitude and phase data. this method avoids fringe counting, and can be automated. The application to sound pressure evaluation is discussed.

Author: Vollesen, Jens Henrik
Affiliation: Cand. Scient. Bang & Olufsen A/S, Struer, Denmark
AES Convention: 88 (March 1990) Paper Number: 2890
Publication Date: March 1, 1990 Import into BibTeX
Subject: Systems and Measurements
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=5804

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes11)   /pp8690/pp9003/2972.pdf

Start a discussion about this paper!