Wearable alert device having selectable alert volume and method of operating same

A wearable alert device includes an audio transducer and driver circuit that allows selection of either a high or low volume setting for driving the transducer. The driver circuit is operable in a single ended mode for low volume and a double ended mode for high volume. The single ended mode holds o...

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Bibliographic Details
Main Authors Verma Amit, De La Cruz Moises, Nguyen Hao, Mor Tal, Diptee Vinosh
Format Patent
LanguageEnglish
Published 10.01.2017
Subjects
ALARM SYSTEMS
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
ORDER TELEGRAPHS
PHYSICS
PUBLIC ADDRESS SYSTEMS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Summary:A wearable alert device includes an audio transducer and driver circuit that allows selection of either a high or low volume setting for driving the transducer. The driver circuit is operable in a single ended mode for low volume and a double ended mode for high volume. The single ended mode holds one terminal of the transducer low while the other is driven in correspondence with a clock signal, while the double ended mode drives one terminal in correspondence with the clock signal and the other terminal is inverted from the clock signal. The transducer is activated in response to an alert event, and can be driven according to a profile or pattern.
Bibliography:Application Number: US201414278032