Assertion: fire engine's siren | /r/CapableOf | output about 120 dba
Facets:
value: often
type: TEMPORAL
value: according to osha
type: OTHER
Source sentences:
text: Sirens often output about 120 dBA, which according to OSHA, 7.5 minutes of exposure is needed and according to NIOSH, 9 seconds of exposure is needed in a 24-hour time period before permanent hearing loss can occur.