发明授权
- 专利标题： Electronic sound level control in audible signaling devices
- 专利标题（中）： 声音信号装置中的电子声级控制
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申请号： US14215469申请日： 2014-03-17
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公开(公告)号： US09576442B1公开(公告)日： 2017-02-21
- 发明人: Christopher M. Baldwin , Joshua K. Brown , Mark T. Monnett
- 申请人： Christopher M. Baldwin , Joshua K. Brown , Mark T. Monnett
- 申请人地址： US IN Indianapolis
- 专利权人： Mallory Sonalert Products, Inc.
- 当前专利权人： Mallory Sonalert Products, Inc.
- 当前专利权人地址： US IN Indianapolis
- 代理商 William F. Bahret
- 主分类号： H04R25/00
- IPC分类号： H04R25/00 ; G08B3/10 ; H04R17/00
摘要：
In further development of U.S. Pat. No. 6,310,540 B1, an audible signal device comprising of a microprocessor or microcontroller and a sounder element, or a microprocessor or microcontroller in conjunction with electronic circuitry such as discrete components, inductors, or IC's with a sounder element where the resulting sound pressure level is controlled by changing the drive signal's frequency, size, shape, and/or duty cycle.
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