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Dual use speaker for both voice communication and signalling

A loudspeaker and volume technology, applied in telephone communication, branch office voice amplifiers, cordless telephones, etc., can solve problems such as damage, uncomfortable hearing, etc.

Inactive Publication Date: 2003-05-21
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of a loudspeaker can lead to certain difficulties, such as if the volume of the "ringing" signal produced by the loudspeaker is sufficient to notify the consumer that the phone is "ringing" when the operator uses the phone, i.e. holds the phone to the operator's ear This acoustic signal can also cause discomfort and / or hearing loss to the operator of the mobile phone when the phone "rings" from time to time

Method used

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  • Dual use speaker for both voice communication and signalling
  • Dual use speaker for both voice communication and signalling
  • Dual use speaker for both voice communication and signalling

Examples

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Embodiment Construction

[0019] In discussing the preferred embodiments illustrated in the figures, like reference numerals are used for like structures in these figures.

[0020] exist figure 1 , methods and apparatus according to the invention are disclosed which comprise a mobile telephone 10 having a "rotatable member" portion 12 comprising a hinge 14 . The rotatable member is movable between a closed position (standby mode), indicated by solid lines, and an open position (active mode), indicated by dashed lines. The main body 16 of the mobile telephone includes a speaker 18 which produces conventional acoustic signals for voice conversations and also produces a "ring" acoustic signal. Utilization of speaker 18 for both voice communication and "ring" signals eliminates the need for a separate buzzer and associated buzzer control circuitry as employed in conventional mobile telephones.

[0021] In a preferred embodiment, the sound of the phone ringing is derived from the top of the phone. The lo...

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PUM

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Abstract

The invention discloses a method and apparatus for automatically limiting the amplitude output of a speaker for a mobile telephone when the telephone is in the active mode of operation. In a preferred embodiment, a tuned cavity in the stand-by mode operates in conjunction with the speaker to provide a higher than normal acoustic output. When the tuned cavity is moved away from the speaker, the acoustic output returns to the level equal to the speaker's normal output. In an electronic embodiment, a device switching the mobile telephone from the stand-by mode to the active mode also enables an amplitude limiter which limits the maximum acoustic output of the speaker to a level sufficient to prevent hearing discomfort or damage.

Description

technical field [0001] The present invention relates generally to mobile telephones, such as cordless telephones and cellular telephones, and more particularly to mobile telephones which utilize a speaker to convert electrical signals into acoustic signals. Background technique [0002] Mobile telephones generally utilize a speaker to convert the electrical signals representing a spoken conversation into acoustic signals, just like conventional telephones. Cordless and cellular phones typically have a "standby" mode of operation (when the phone is not currently in use but can receive calls) and an "active" mode of operation (when the phone is being used to make a call or has been answered). The buzzer is used alone in many mobile phones to generate a "ring" signal to report to the operator when the phone is in a "standby" mode of operation (equivalent to a conventional phone with the receiver on the cradle) A call comes. [0003] To be heard properly, the peak output of a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/02H04M1/00H04M1/02H04M1/03H04M1/60H04M1/724H04M19/04
CPCH04M19/04H04M1/0245H04M1/6041H04M1/0214H04M19/042H04M1/035H04M1/6016H04M1/72519H04M1/724
Inventor K·W·拉贝T·斯特恩
Owner TELEFON AB LM ERICSSON (PUBL)