signal whistle
Emergency sound maker
A signal whistle is a whistle designed to produce a loud, carrying sound for communication or emergency alerts.
Lifeguards, referees, and hikers carry signal whistles to attract attention across distances.
Unlike musical whistles, signal whistles prioritize volume and penetration over tone: Every life jacket should have a signal whistle attached.
- shrillHigh-pitched and harsh
- high pitchedElevated in frequency
- blastSudden forceful burst
- refereeSports rule enforcer
- sports officialRules enforcer in games
train · train conductor · emergency · piercing · blow · pea · coach · alert · attention · shriek · metal · lifeguard · lifeguard stand · sharp · trill · warning · stop · loud
audibility/presence
signal whistlesilence
Total lack of sound
visual signal · hand signal · light signal · semaphore · smoke signal
signal, whistle, signals, signaled, signaling, signaler, signatory, signature, sign