CPC G06F 3/162 (2013.01) [G08C 17/02 (2013.01); H03F 3/183 (2013.01); H04R 3/00 (2013.01); H03F 2200/03 (2013.01); H04R 2420/03 (2013.01)] | 20 Claims |
1. An audio accessory for a radio, the audio accessory comprising:
a speaker;
an audio interface to connect to a respective audio interface of the radio;
a switching circuit located between the audio interface and the speaker, the switching circuit comprising:
a high impedance path between the audio interface and the speaker;
a low impedance path between the audio interface and the speaker; and
a switch to connect the audio interface to the speaker via one of the high impedance path or the low impedance path, the switch initially connecting the audio interface to the speaker via the high impedance path;
a first data interface to connect to a respective first data interface of the radio; and
a controller configured to:
receive, via the first data interface, from the radio, a message to control the switch to connect the audio interface to the speaker via the low impedance path; and
in response to receiving the message, control the switch to connect the audio interface to the speaker via the low impedance path.
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