Determination of Sound Absorption Coefficients Using a Tone-Burst Technique
Measurements of the sound absorption coefficient of acoustic materials are made in a free field by means of a tone-burst technique. In an anechoic chamber a narrow band sinusoidal pulse travels from a highly directive sound source towards an absorbing material at angles of incidence
varying from 0° to 70° and the reflection is received by a microphone. From the reflection coefficient obtained by reflecting this tone-burst from both a perfectly reflecting panel and a combination of this panel and the sample, the absorption coefficient of different materials is
calculated by means of the well known formula:
α =1 − [P r′/P r]2.
The measurements are made in the frequency range from 2 to 10 kHz.
α =1 − [P r′/P r]2.
The measurements are made in the frequency range from 2 to 10 kHz.
Document Type: Research Article
Publication date: 01 November 1973
- Access Key
- Free content
- Partial Free content
- New content
- Open access content
- Partial Open access content
- Subscribed content
- Partial Subscribed content
- Free trial content