Assertion: speaker's sensitivity | /r/DefinedAs | many decibels
Facets:
value: usually
type: TEMPORAL
value: at a single frequency
type: TEMPORAL
value: at 1 w electrical input
type: OTHER
Source sentences:
text: Sensitivity is usually defined as so many decibels at 1 W electrical input, measured at 1 meter (except for headphones), often at a single frequency.