One application we get requests for is a wireless intercom that can be heard in noisy environments. Usually one intercom is in a quiet office environment and the other in a garage or workshop where loud engines or machinery is being used. The person in the noisy environment can’t hear someone calling them on the intercom.
We have a couple of ways we handle this application. Both applications require installing a wireless intercom on both the quiet and noisy sides.
In really noisy environments we recommend installing the MURS Wireless PA system. he MURS Wireless PA (Public Address) is a radio receiver that allows you to use your base station intercom or mobile 2-way radio to deliver voice messages directly to an attached PA horn speaker up to 2 miles away. While this PA system can’t be used for two way communication, it will get the attention of someone in a noisy environment so they can stop what they are doing and go to a wireless intercom to talk. In this application either the MURS Multi-Mile Intercom or the MURS Commercial Intercom will work on either side. You can mix these two together since they will talk to each other.
You would put the MURS Wireless PA on a different channel than you use to communicate between the quiet and noisy areas. So to contact someone, you switch to the PA channel, speak your message, and then switch back to the communication channel to talk to them.
In marginally noisy environments we recommend the MURS Commercial Intercom on the noisy side. You can add an external speaker to this unit that will increase the volume a little. If you have a powered amplifier of some sort laying around, you could also feed the output jack on the MURS Commercial Intercom into your amplifier to increase the volume of the signal. You can use the less expensive MURS Multi-Mile Intercom on the quiet side.