AUTOMATIC VOLUME CONTROL FOR LAND MOBILE RADIO

摘要

The present disclosure provides a radio and method for automatically adjusting, in response to ambient noise, the volume setting of a radio. The radio comprises a microphone for receiving ambient audio and generating a microphone signal; a codec for receiving the microphone signal and generating a processor signal representative of the ambient audio; and processor circuitry operable to receive the processor signal, determine an ambient audio level in response to the processor signal, and determine an adjusted radio volume to generate a radio volume control signal, wherein the adjusted radio volume is determined by calculating a difference between a baseline volume level and ambient audio level and adding a current volume level setting, wherein the codec is also operable to receive the radio volume control signal and generate an output signal to adjust the radio volume setting to maintain a net difference between the adjusted radio volume and ambient audio.

主权项

1. A land mobile radio for use in a land mobile radio (LMR) system, the land mobile radio configured to automatically adjust a volume setting of the land mobile radio in response to ambient audio, the land mobile radio comprising:
a first microphone configured to receive the ambient audio and generate a microphone signal in response to receiving the ambient audio; an analog-to-digital converter configured to receive the microphone signal and generate a processor input signal representative of the ambient audio; first circuitry configured to receive the processor input signal, determine an ambient audio level in response to the processor input signal, and determine an adjusted radio volume to generate a radio volume control signal, wherein the adjusted radio volume is determined by calculating a difference between a baseline volume level and the ambient audio level and adding a current volume level setting; and a digital-to-analog converter configured to receive the radio volume control signal and generate an output signal to adjust the volume setting of the land mobile radio such that a net difference is maintained between the adjusted radio volume and the ambient audio.