Acoustic white noise generator

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...

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73 675R, 73 88R, G01N 2900

Patent

active

040431762

ABSTRACT:
A narrow banded acoustic transducer is driven by a VCFO whose output is varied by input signals of variable amplitude. One can simulate acoustic emissions for purposes of calibrating transducers which monitor a structural part for such emissions. Different signals for the control of the VCFO are generated to provide for specific test pulses.

REFERENCES:
patent: 3967143 (1976-06-01), Watanabe et al.
Fowler, K. A., Acoustic Emission Simulation Test Set. From Materials Research and Standards, Mar. 1971, pp. 35, 36.

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