English
Suomi
A notch filter removes a narrow band of pitches from a sound and leaves the rest. In Hush Plus it sits at your matched pitch, about an octave wide. Research does not establish that a notch reduces tinnitus; it is a sound adjustment.
What you hear
Hush's notch is about an octave wide. In most sounds it is subtle: the sound keeps its character, with a little less energy around one pitch. It is easiest to hear in steady noise.
Where the idea comes from
Notched sound has been studied as a way of listening with tinnitus, with mixed results. Research does not establish that a notch reduces tinnitus, and Hush makes no such claim: the notch is a sound adjustment.
Turning it on
Save a pitch first. Notch at matched pitch then appears in Sound controls and in Settings. With Hush Plus and a saved pitch it starts switched on, and you can turn it off at any time.
How wide the notch is
Hush's notch is about one octave wide, centred on your matched pitch. The band it takes energy from moves with the pitch:
| Matched pitch | Approximate band |
|---|---|
| 3 kHz | 2.1 to 4.2 kHz |
| 4 kHz | 2.8 to 5.7 kHz |
| 6 kHz | 4.2 to 8.5 kHz |
| 8 kHz | 5.7 to 11.3 kHz |
If your match was not quite right
The notch can only sit where you put it. Pitch matches often differ from one day to the next, so if the notch does not seem to line up, match again on another day: the notch follows the new pitch straight away. Matching your pitch has tips for a closer match.
