Display system for steady state waves

Details Display system for steady state waves Display system for steady state waves

1980-09-29

1982-08-17

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

73646, 179 1MN, 324 96, 340660, 340753, 434300, G09G 300

Patent

active

043452477

ABSTRACT:
A system for directly displaying steady state waves, such as sound waves, ultrasonic waves, electromagnetic waves, and the like, by instantaneously sampling the amplitude of the waves in a known phase relationship with some other portion of the wave train. The system includes a source of the waves, such as a speaker, and a transducer, such as a microphone, an electrical signal source being coupled to the wave signal source, and the transducer being connected to a sample and hold circuit whose output is applied to a light emitting diode (LED), or other display unit. The transducer is moved towards and away from the wave signal source in the path of the waves eminating from the wave signal source. In the following description the system will be described in conjunction with wound waves traveling in air, eminating from a speaker and transduced by a microphone. It will be evident as the description proceeds that the system may be used for displaying waves other than sound waves, such as ultrasonic waves; and/or for displaying waves traveling in a medium other than air.

REFERENCES:
patent: 2571156 (1951-10-01), Nelson
patent: 3480912 (1969-11-01), Speeth et al.
patent: 3796951 (1974-03-01), Joseph
patent: 3927399 (1975-12-01), Fuzzell
patent: 3952247 (1976-04-01), Horichi
patent: 4073194 (1978-02-01), Willson et al.

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