Assertion: felt | /r/HasProperty | placed under the piano
Facets:
value: to control key noise
type: PURPOSE
value: to control touch
type: PURPOSE
Source sentences:
text: Felt is placed under the piano keys on accordions to control touch and key noise; it is also used on the pallets to silence notes not sounded by preventing air flow.
text: Felt is placed under the piano keys on accordions to control touch and key noise; it is also used on the pallets to silence notes not sounded by preventing air flow.