A reference design for radio microphones using the Digital Enhanced Cordless Telecom­munications (DECT) platform has been announced by Cambridge Consultants, enabling design of low-cost, ultra-spectrum-efficient radio microphones.

By using DECT, the company’s new design enables higher audio quality with no interference.

The design deploys the company’s DECT-based Salix audio distribution platform, which gives 15kHz audio bandwidth.

DECT has a dedicated license-exempt band in most countries worldwide and also ensures that the new microphone platform has high spectral density, allowing up to 40 microphones in a single space without mutual interference or spurious effects.

It also extends the range of radio microphones up to 100 metres without needing line of sight to the transmitter.

An automatic frequency band allocation ensures that the new microphones can be ‘paired’ with the receiver(s) with a simple button press.

The microphone system reference design is available as a hardware documentation package including photoplot and assembly information, with executable software for both transmitter and receiver ends. Alternatively, source code licensing is available for custom design.

It comprises a transmitter board of suitable size to fit within a handheld microphone or belt-pack transmitter, and a receiver board with diversity antennas. Pairing a microphone to a receiver is by a simple one-step user process.

A modern high quality, low latency music codec delivers audio with a 15kHz bandwidth.

Cambridge Consultants