SOUND PRODUCING APPARATUS

A sound producing apparatus is provided. The sound producing apparatus (10) comprises a driving circuit (12) and a sound producing device (14). The driving circuit (12) is configured to generate a driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	Liang, Jemm Yue
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	A sound producing apparatus is provided. The sound producing apparatus (10) comprises a driving circuit (12) and a sound producing device (14). The driving circuit (12) is configured to generate a driving signal according to an audio input signal, wherein the driving signal comprises a pulse amplitude modulated signal generated according to the audio input signal. The pulse amplitude modulated signal comprises a plurality of pulses at a pulse rate. Two consecutive pulses among the plurality of pulses are temporally spaced by a pulse cycle. The pulse rate is a reciprocal of the pulse cycle. The pulse rate is larger than a maximum audible frequency. The sound producing device (14) is coupled to the driving circuit (12) and configured to produce sound according to the driving signal.