公开(公告)号：US09877097B2

公开(公告)日：2018-01-23

申请号：US14735407

申请日：2015-06-10

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Teik Seng Saw ,  Cheah Heng Tan ,  Huoy Thyng Yow

IPC: H04R1/08

CPC classification number: H04R1/086 ,  H04R2410/07 ,  H04R2499/11

Abstract: A housing having a port for reducing wind-induced noise in a communication device. The housing includes a first channel, a second channel, and a ridge between the first and second channels. The housing further includes a tunnel extending through the ridge, which tunnel connects the first and second channels. The housing further includes a microphone port beneath the ridge, which microphone port is connected to the tunnel and connects the tunnel to a microphone cavity in the housing.

公开(公告)号：US09369800B2

公开(公告)日：2016-06-14

申请号：US14037900

申请日：2013-09-26

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Cheah Heng Tan ,  Friedrich J Bollmann ,  Teik Seng Saw ,  Peter William Hilding Svendsen ,  Kheng Shiang Teh

IPC: G03G11/00 ,  H04R3/00 ,  H04R9/02

CPC classification number: H04R3/007 ,  H04R9/022 ,  H04R2209/024 ,  H04R2209/041

Abstract: An intrinsically safe audio circuit and intrinsically safe portable two-way radio device meet conventional audio output requirements and intrinsically safe design limitations by separating the speaker coil of the device's speaker into separate coils to limit the energy storage possible in any one of the coils. Each separate coil is driven by one of several different audio power amplifiers that each output a substantially identical signal, and each of which are current limited.

Abstract translation: 本质安全的音频电路和本质安全的便携式双向无线电设备通过将设备扬声器的扬声器线圈分离成单独的线圈来限制任何一个线圈中的能量存储，从而满足传统的音频输出要求和本质安全的设计限制。 每个单独的线圈由几个不同的音频功率放大器中的一个驱动，每个音频功率放大器输出基本相同的信号，并且其中的每个都是电流限制的。