Quick changes in loudness level
Loud sounds should not have the same amount of gain as is applied in a quiet environment. Therefore, when the sound level increases rapidly, the hearing aid must be able to react very quickly.
The TruSound stabilisers are a fast-acting mechanism that is able to lower the gain quickly to adapt to the louder sound level.
Without the TruSound stabilisers, full gain is applied to the loud peaks, which will sound very loud to the user. When the TruSound stabilisers are activated, on the other hand, the peaks are dampened.
Another situation where the TruSound stabilisers would be activated is when the hearing aid user receives a mobile call during a loud party and leaves the room to answer.
The TruSound stabilisers make sure that gain is changed quickly from the low gain needed in the very loud party environment to the gain needed for normal conversations.