Speaker enclosure design for efficiently generating an audible alert signal

Various inventive features are disclosed for efficiently generating regulation-compliant audible alerts, including but not limited to 520 Hz square wave alert/alarm signals, using an audio speaker. One such feature involves the use of a non-linear amplifier in combination with a voltage boost regula...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	SMITH LANDGRAVE T, ALBERT DAVID E, LEWIS JAMES J
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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