公开(公告)号：WO1998024215A1

公开(公告)日：1998-06-04

申请号：PCT/US1997021930

申请日：1997-11-24

Applicant: ERICSSON INC.

Inventor： ERICSSON INC. ,  STERN, Trampas

IPC: H04M01/60

CPC classification number: H04M1/215 ,  H04M1/0262

Abstract: A battery pack is provided for use with a mobile phone. The battery pack includes audio signal power amplifier circuitry with an inductive coil. The inductive coil boosts the magnetic field strength of the audio signal received by the phone, so that a tele-coil circuit for a hearing aid can be used to pick up the audio signal received by the phone. Consequently, the picked up audio signal can be discerned from the magnetic noise created by the phone. Also, the use of the battery coil allows a tele-coil pick up of the audio signal even if the phone has a speaker that does not generate an appreciable magnetic field.

Abstract translation: 提供一个用于手机的电池组。 电池组包括具有感应线圈的音频信号功率放大器电路。 感应线圈增强了由电话接收的音频信号的磁场强度，使得用于助听器的远程线圈电路可以用于拾取由电话接收的音频信号。 因此，拾取的音频信号可以从由电话产生的磁噪声中辨别出来。 此外，即使电话具有不产生可感知的磁场的扬声器，电池线圈的使用也允许远程线圈拾取音频信号。

公开(公告)号：WO1998027710A1

公开(公告)日：1998-06-25

申请号：PCT/US1997023197

申请日：1997-12-15

Applicant: ERICSSON INC.

Inventor： ERICSSON INC. ,  RABE, Karl, W. ,  STERN, Trampas

IPC: H04M01/72

CPC classification number: H04M1/6016 ,  H04M1/0214 ,  H04M1/0245 ,  H04M1/035 ,  H04M1/6041 ,  H04M1/72519 ,  H04M19/04 ,  H04M19/042

Abstract: Disclosed is 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.

Abstract translation: 公开了一种当电话处于主动操作模式时自动限制用于移动电话的扬声器的振幅输出的方法和装置。 在优选实施例中，待机模式下的调谐腔与扬声器一起工作以提供高于正常的声输出。 当调谐腔离开扬声器时，声音输出返回到等于扬声器正常输出的电平。 在电子实施例中，将移动电话从待机模式切换到活动模式的设备还使得能够将扬声器的最大声输出限制到足以防止听觉不适或损坏的水平的限幅器。

公开(公告)号：EP0947084A1

公开(公告)日：1999-10-06

申请号：EP97952468.0

申请日：1997-12-15

Applicant: ERICSSON INC.

Inventor： RABE, Karl, W. ,  STERN, Trampas

IPC: H04R1 ,  H04M1 ,  H04M19

CPC classification number: H04M1/6016 ,  H04M1/0214 ,  H04M1/0245 ,  H04M1/035 ,  H04M1/6041 ,  H04M1/72519 ,  H04M19/04 ,  H04M19/042

Abstract: Disclosed is 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.