Audio impedance/calculated power meter

Details Audio impedance/calculated power meter Audio impedance/calculated power meter

1997-08-04

2000-05-16

Isen, Forester W

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

381 59, H04R 2900

Patent

active

060647426

ABSTRACT:
For audio professionals, sound contractors, installers and the like, a hand-held electronic instrument facilitates analyzing and optimizing speaker systems or portions thereof which may include anything from a single speaker to transmission lines of a field-installed distributed system. The instrument measures and displays impedance in ohms on a numeric readout and additionally calculates power based on a designated audio line voltage, as user-selected by a panel switch, e.g. from 25, 50, 70 or 100 volts, and displays the calculated power in watts, based on measured load current at a constant applied. The test frequency can be user-selected by a panel switch, e.g. to 100, 330, 1k or 10k Hz.

REFERENCES:
patent: 4061891 (1977-12-01), Pommer
patent: 4870341 (1989-09-01), Pihl et al.

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