rumble filter การใช้

The rumble filter prevents this noise from being amplified and sent to the loudspeakers.
Rumble filters are high-pass filters applied to the removal of unwanted sounds near to the lower end of the audible range or below.
Underneath these controls were a series of black push buttons which allowed control of the input sources as well as loudness, high pass filters, rumble filters and tape bypass.
The switches for some settings, such as the on-off switch for the speaker-protection limiter or a low-pitch " rumble filter " ( designed to protect speakers from very low sounds ), may be hidden behind a screwed-on door or metal plate.