A former recording engineer, Dorrough started manufacturing the DAP310 discriminate audio processor in 1972. In the following years, he traveled throughout the country teaching the techniques of quality audio to myriad radio engineers and station managers. Dorrough's audio processing device allowed stations to achieve high audio quality in the days of radio "loudness wars." Discriminate audio processing is at the heart of practically every major audio processor being marketed today. Thanks to his pioneering work, broadcast audio can sound excellent not only on small radios, but also on the most expensive home and automobile systems.
In addition to his work in the field of audio processing, Dorrough invented the Dorrough Loudness Monitor with a patented technology developed to give broadcast and recording engineers a true indication of "loudness" as perceived by the human ear. The audio loudness monitor is now in use worldwide in radio production, motion picture production, posting, music mixing, and dubbing applications.
Technical Achievement Award (Certificate) 1993: For the design and development of the compound meter known as the Dorrough Audio Level Meter.
1 Scientific/Technical Award