Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-03-09
1978-06-13
Olms, Douglas W.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 57SS, H04R 2900
Patent
active
040950573
ABSTRACT:
Frequency response testing apparatus, developed for use with hearing aids, comprises a generator providing a predetermined varying-frequency input for the device under test, and a discriminator which applies incremental output level signals from the device to a display matrix of LED's under the control of timing signals derived from the generator, the overall arrangement providing a display in the form of a linear graphical plot.
REFERENCES:
patent: 3093711 (1963-06-01), Comerci et al.
patent: 3267222 (1966-08-01), Chipp et al.
patent: 3692959 (1972-09-01), Lamp
patent: 3922506 (1975-11-01), Frye
Barker Alan Anthony
Grover Brian Clifford
Martin Michael Charles
Power Ronald Frederick
National Research Development Corporation
Olms Douglas W.
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