police whistle
Cop's shrill alert
A police whistle is a small metal whistle producing a loud, shrill tone, traditionally used by police officers to signal for attention, summon help, or direct traffic.
The classic design—a cylindrical tube with a pea inside—creates a distinctive trilling sound that carries over urban noise: She blew her police whistle to stop the fleeing suspect.
- shrillHigh-pitched and harsh
- shrill soundHarsh high-frequency noise
- blowMove air forcefully
- refereeSports rule enforcer
- trafficMovement along routes
traffic cop · crossing guard · signal · stop signal · cop · patrol · alert · emergency · emergency call · tweet · pea · metal · lanyard · blast · stop · uniform · arrest · attention
police whistlehand signal
Motion conveying information
written notice · flashing light · visual signal · text message · radio transmission
police, whistle, policed, policing, polices, policeman, policewoman, policemen, policewomen