Voice and sound processing software

This technology has been commercialized for portable defibrillators globally with enhanced effectiveness proven through thousands of uses. Novel voice and sound processing developed internally composed of two distinct areas:

ClearVoice™ - trade secret, trademarked, psychoacoustic processing of the voice prompts embedded into the wave-files improving the voice prompts resistance to ambient masking

VariSound™ – patent pending control system for automatically adjusting a sound playback system appropriately for the environment. May adjust both sound level and sound spectrum.

Our acoustic research has resulted in the ClearVoice™ processing technology that is used for voice prompts in products in 35 languages and the CPR Metronome that guides rescuers in performing chest compressions at the right pace. This technology allows voice prompts and the metronome ‘tock’ to be heard more clearly than would otherwise be possible in noisier environments. It also avoids over-stimulating rescuers’ hearing—so they don’t feel yelled at in quiet resuscitation venues like a home bedroom.

Knowing that a lower frequency sound (engine rumble) could swamp our ability to hear a higher frequency (voice) helps us enhance the sound profile of a defibrillator’s voice prompt or metronome so it is more likely to be heard despite the constant roar of freeway traffic or the rumble of an ambulance engine or the din of a crowded casino. It’s a balancing act, because the same device used for resuscitation on a busy freeway shoulder is also carried into a quiet bedroom, so the voice prompt must work well with the human auditory system in both environments.

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