VERIFYING SPEAKER OPERATION DURING ALARM GENERATION

The patent discloses a method of verifying that a dialysis machine audio alarm has been sounded. The method senses a waveform of electric power, such as a waveform of the current or voltage that drives a speaker. When the speaker produces sound, power consumption changes the waveform in a manner tha...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	BEDINGFIELD, JOHN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALARM SYSTEMS DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES ORDER TELEGRAPHS PHYSICS PUBLIC ADDRESS SYSTEMS SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING TRANSMISSION
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