I'm a volunteer firefighter. We have two kinds of radio traffic. Tones and voice. Tones trigger our pagers, but are also audible when listening to the radio. The trouble is that the tones are much louder than the voice traffic.
What happens is that we turn the radio up loud enough to hear dispatch and other units, then tones are dropped for another call and they are incredibly loud. We scramble to lower the volume (which is not easy on the model of radio we have) and then have to turn it back up quickly as soon as the tones are over.
The radio is connected to a single speaker in the cab.
What can I put in-line between the radio and the speaker that will let me temporarily reduce (ideally not mute) the volume quickly and return it to its original volume?
I'd really like a momentary switch (foot peddle). My initial thought was to use a simple resistor, but now I'm thinking that won't work as expected. I need something simple and robust (firefighters are good at breaking stuff).