Invention Grant
US5655017A Portable telephone with speakerphone 失效
带免提电话的便携式电话

Portable telephone with speakerphone
Abstract:
A portable telephone includes a telephone body; a circuit mounted in the telephone body for receiving a signal and for supplying a signal for transmission; and a bass reflex speaker connected with the telephone body and the circuit for radiating an audio signal therefrom in response to the transmitted signal, the bass reflex speaker including a housing connected to the telephone body, an opening in the housing, a speaker mounted in the opening of the housing and connected to the circuit for radiating an audio signal outwardly of the housing in response to the received signal, a tuned port in the housing for radiating a back wave audio signal of the speaker therethrough, a tube in the housing and connected with the tuned port for enhancing tuning of the tuned port, a pressure switch for activating the bass reflex speaker to radiate the audio signal when the telephone body is positioned on a surface in an upright position, and a volume control connected to the circuit and which controls a volume of the audio signal radiated from the bass reflex speaker.
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