An alarm clock is a clock that is intended to make an attentive sound at a specific date and/or time. The primary use of these clocks is to stimulate people from their sleep in order to start their days in the mornings, but they are sometimes used for other reminders as well. To stop the sound, a button or switch on the clock needs to be pressed, and some stop mechanically after a few minutes if left unattended. A typical analog alarm clock has an extra "hand" that is used to specify the time at which to activate the alarm.
Traditional mechanical alarm clocks have a bell on top that rings, but digital alarm clocks can make other noises. Simple battery-powered alarm clocks make a loud buzzing sound, or other similar noise to wake a sleeper, while originality alarm clocks can speak, laugh, or sing. Some alarm clocks have radios that start playing at individual times, and are known as clock radios. A progressive alarm clock, still new in the market, can have different alarms for different times.
In a mechanical bell-style alarm clock, a spring drives a stuff that propels a clacker back and forth between two bells or between the sides inside a single bell. In an electric bell-style alarm clock, the bell rings with an electromagnetic circuit and skeleton that turns the circuit on and off again repeatedly.
Traditional mechanical alarm clocks have a bell on top that rings, but digital alarm clocks can make other noises. Simple battery-powered alarm clocks make a loud buzzing sound, or other similar noise to wake a sleeper, while originality alarm clocks can speak, laugh, or sing. Some alarm clocks have radios that start playing at individual times, and are known as clock radios. A progressive alarm clock, still new in the market, can have different alarms for different times.
In a mechanical bell-style alarm clock, a spring drives a stuff that propels a clacker back and forth between two bells or between the sides inside a single bell. In an electric bell-style alarm clock, the bell rings with an electromagnetic circuit and skeleton that turns the circuit on and off again repeatedly.
