Dual loudness meter and method

Details Dual loudness meter and method Dual loudness meter and method

1982-05-14

1985-07-09

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Demand, excess, maximum or minimum

324 96, 324114, 324122, 381 56, G01R 1904, G01R 100, H04R 2500

Patent

active

045285012

ABSTRACT:
A dual loudness meter and method for simultaneously indicating the apparent loudness of composite audio program material representing peak material or of persistent material employing a first detector means responsive to peak signals for instantaneously indicating the same as a singly actuated LED indicator in an array thereof displayed in accordance with the peak strength of the signal, a second detector for detecting the persistence of the signal and displaying the same as a bar graph on said LED display, the materials being colinearlly displayed and having dual upper extreme warning/operating indicator means separated by about 12 to 14 dB so that the meter is read as requiring adjustment of the associated recording or broadcast facilities to avoid having either of said programming indicator displays reading consistently in either warning/operating zone. Specific circuits and time constants of response and decay are given as appropriate to the simultaneous reading, dual meter system disclosed.

REFERENCES:
patent: 3922666 (1975-11-01), Inami et al.
patent: 4166245 (1979-08-01), Roberts
patent: 4183025 (1980-01-01), Kuraragi et al.
patent: 4262255 (1981-04-01), Kokei et al.
Moore, B. C. J.; An Introduction to the Psychology of Hearing; Academic Press, N.Y., N.Y.; 1982; pp. 40-73.
Chinn et al., A New Standard Voltage Volume Indicator and Reference Level, 49 pages.

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