Car alarm the main reason why loud bass frequency sound (loud music, other cars or motorcycles with loud exhaust systems, thunderstorms, etc.) can set off car alarms. The second possible reason is that some parts of the alarm system may be improperly installed. Car alarm A car alarm is an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle itself, its contents, or both. Car alarms work by emitting high-volume sound (often a vehicle-mounted siren, klaxon, pre-recorded verbal warning, the vehicle's own horn, or a combination of these) when the conditions necessary for triggering it are
Muster drill trips on the water, such as those taken on ferries, dinner cruises, and riverboats. On ferries, a safety briefing delivered through the PA system alerts passengers to the sound pattern of the emergency alarm and what to do if the signal is heard. Generally, the muster drill is taken in simple instructions: The "general emergency alarm" consists of seven or more short blasts followed by one long blast of the ship's horn or whistle (some lines don't sound the signal on the horn or whistle) and by the ship's internal alarm (such as fire alarm bells accompanied with flashing strobe