Speech Guard

Speech Guard preserves signal fidelity and the important details of speech.

Speech Guard is a unique dual analysis signal processing technology that continuously evaluates incoming sound signals BEFORE they are amplified.

Speech Guard consists of two parallel analysis functions. One analysis function monitors the long-term, overall level of the input and adjusts the gain of the hearing instrument accordingly. This places the full dynamic range of the speech signal within the user's remaining dynamic range. If the overall level of the incoming speech signal goes up or down, appropriate gain changes are made.

The second analysis function monitors sudden large changes in the signal. If such a change is detected beyond the moment-to-moment fluctuations that are expected in the speech signal, an instantaneous, momentary adjustment in gain keeps the sudden sound from becoming uncomfortable or distracting.

Speech Guard Signal Processing

 

Speech plus Noise Burst
When a sudden signal change is abruptly introduced- such as a door slam- to the long-term average signal, the Fast Level Estimator recognizes the change.

Speech plus Noise Burst with Speech Guard
The Fast Level Estimator precisely compresses the unwanted sound without causing any distortion to the neighboring phonemic environments. This very fast, exact, laser-like action ensures the fidelity of the signal remains intact.