The CM-3 conference microphone has been designed to enhance the pickup range for a wide variety of assistive listening devices and digital voice recording devices including computers. With CM-3's daisy-chain capability, there is no need for passing the microphone around or to miss out on faint voices during play-back of the meeting recordings.
CM-3 Microphones (discontinued October 1, 2022). Accessories still available.
All about the CM-3 Conference Microphone System
The CM-3's contemporary design affords discrete setup at any conference table. It is a so-called boundary type microphone, where the hard reflective surface (the conference table) it is placed on constitutes the boundary. Taking advantage of the natural boundaries has resulted in a small compact design with it's main body fitting in the palm of a hand. A dense body composition combined with large rubber feet prevents skidding on any surface and reduces annoying mechanical noises usually associated with conference arrangements. To enhance intelligibility, the microphone has been designed to provide a smooth boost in the frequencies around 3 kHz. With it's unique daisy-chain capability, even the longest conference table can be adequately covered for the hard of hearing as well as for recording meetings.
The CM-3 conference microphone works with all brand name assistive listening devices, voice recording devices employing electret microphones and all computers. Most assistive listening devices such as personal FM systems can power at least two CM-3 microphones. Computers and base station transmitters at least four(4). Although not all, most computers with 3.5mm microphone input jacks require the microphone plug to be a 3.5mm stereo type plug. Since the CM-3j microphone's daisy-chain capability is based on mono plugs, a mono to stereo adapter may be required. For computers without a 3.5mm microphone input jack, a USB audio adapter is required. When using this adapter, it is important to make sure that the proper microphone (USB PnP Sound Device) is selected in the application tool box or in Windows control panel "Sound" "Recording". Also, make sure to set "Properties" for "Level" or "Microphone boost" appropriately.
For assistive listening applications, the typical pick-up range is 8-12 feet. However, the realized pick-up range may vary from 5 to 15 feet depending on environmental conditions and individual user's discrimination score. However, one of the CM-3's main features is it's daisy-chain capability. The effective pickup range can be expanded substantially by daisy chaining two or more CM-3 conference microphones together with Y-splitters and extension cords.. If more than four microphones are required, we recommend the use of an automatic microphone mixer such as Audio-Technica AT-MX341a SmartMixer, Shure SCM810 8-Channel Automatic Mixer, or similar.