Measuring and testing – Vibration – By mechanical waves
Patent
1981-08-17
1983-08-09
Gill, James J.
Measuring and testing
Vibration
By mechanical waves
73645, G01H 1500
Patent
active
043971873
ABSTRACT:
Acoustical transmission loss of sheet materials in the low frequency range is measured by utilizing a cylindrical test chamber containing a speaker directed towards the upper end to which the sheet material is mounted. Pressure gradient microphones are mounted on either side of the sheet material and are connected to electronic circuitry for responsively indicating the transmission loss measurement across said sheet material.
REFERENCES:
patent: 2837914 (1958-10-01), Caldwell
patent: 3470734 (1969-10-01), Agdur et al.
"A Measuring Technique for Sound Transmission . . . " by Shenoda from J. Acoustic Society of India, vol. VIII, No. 4, pp. 15-18.
T. J. Schultz, "Acoustic Wattmeter", Jul. 1956, pp. 693-699; The Journal of Acoustical Society of America, vol. 28, No. 4.
Albert London, "Methods for Determinng Sound Transmission Loss in the Field," May 1941, pp. 419-453; Part of Journal of Research of the Natl. Bureau of Standards, vol. 26.
David I. G. Jones, "Damping Treatments for Noise and Vibration Control", Jul. 1972, pp. 25-31; Sound and Vibration.
Ford Motor Company
Gill James J.
Godwin Jr. Paul K.
Sanborn Robert D.
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