Title: Passenger entertainment system transducer failure detector

Abstract: Common seat group transducer BITE circuitry located within the seat group SEB is responsive to the audio signal output of each transducer driver amplifier, the transducer BITE circuitry sensing the peak-to-peak voltage amplitude of the output signal to determine the operability of each driver, and sensing the current amplitude and frequency of the output signal to determine the transducer operability.

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Inventors: Lach, Richard F. (Hartford, CT)
Calcasola, Richard W. (Longmeadow, MA)

Application Number: 06/219740
Filing Date: 1980-12-23
Publication_date: 1983-02-15
Assignee: UNITED TECHNOLOGIES CORP

Primary Class(es): 370/241 381/58, 381/77
Other Classes: H04J3/14; H04R27/00; H04R29/00; H04J3/14
US Patent Ref:

3566038	February, 1971	Slavin	370/110.1	MULTIPLEXED ENTERTAINMENT-SERVICE SYSTEM
3585307	June, 1971	Greenberg	370/110.1	SELF-TEST ARRANGEMENT FOR AN ENTERTAINMENT-SERVICE SYSTEM
3795771	March, 1974	Gunderson et al.	370/15	PASSENGER ENTERTAINMENT/PASSENGER SERVICE AND SELF-TEST SYSTEM
3916381	October, 1975	Johnson et al.	340/660	Loop arrangement to test a remote subscriber's drop from a central office via a PCM subscriber carrier system
4065647	December, 1977	Frye et al.	179/175.1A	Automatic acoustical testing system
4095057	June, 1978	Power et al.	179/175.1A	Frequency response testing apparatus

Other Refs:
Primary Examiner: Brigance, Gerald L.
Assistant Examiner:
Attorney: Chiantera, Dominic J.

Claims:

We cl