ISM Band Coexistence

This paper discusses ISM band coexistence issues for wireless audio applications, and some of the factors that should be considered in selecting a wireless audio technology. The Industrial, Scientific, and Medical (ISM) radio bands were created as a place to relegate equipment that produces a lot of radio interference that could disrupt other radio applications that are sensitive to such noise. The license-free nature of these bands has made them attractive for use by various commercial applications/communication protocols such as Wireless Local Area Network (WLAN), Bluetooth (BT), cordless telephones, baby monitors, wireless security systems, etc. Consequently, these protocols are subject to interference from noisy equipment such as microwaves as well as from other intelligent applications competing for the same space.