Is your car too loud? DSP (Digital Speech Processor) eliminates background noise while re-sampling your voice, delivering clear voice communications. When wind or motor noise is a big problem in your offroad race car, prerunner, sandcar, or offshore boat, the DSP goes to work sampling the noise and filtering your voice for clear effortless communications. Easy to install and easy to hear, DSP is the future in clear communications. The Digital Speech Processor (DSP Chip) is an optional accessory for all Rugged Radios Off-Road Intercoms. (not compatible with Aviation/Industrial intercoms)