Ultrasonic sensing

Details Ultrasonic sensing Ultrasonic sensing

1980-12-16

1983-08-16

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73 61R, 73644, G01N 2900

Patent

active

043984240

ABSTRACT:
A pulse-echo device with an improved signal-to-noise ratio, in which sound-transmitting material adjacent to the device is coated with a sound-absorbing layer, the layer being sound-impedance matched to the material so that much of the spurious ultrasonic energy travelling in the material passes through the layer-material interface into the layer where it dissipates instead of remaining in the material and reflecting back to the device.

REFERENCES:
patent: 2515221 (1950-07-01), Henning
patent: 3204458 (1965-09-01), Gillen
patent: 3751979 (1973-08-01), Ims
patent: 3821834 (1974-07-01), McElroy
patent: 3844164 (1974-10-01), Romere
patent: 3906780 (1975-09-01), Baldwin
patent: 4019373 (1977-04-01), Freeman et al.
patent: 4112773 (1978-09-01), Abts
patent: 4214484 (1980-07-01), Abts

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