Alarm clock
Alarm Clock
An Alarm Clock (pronunciation: /əˈlärm kläk/) is a device designed to alert an individual or group of individuals at a specified time. The primary function of these clocks is to awaken people from their night's sleep or short naps; they are sometimes used for other reminders as well.
Etymology
The term "Alarm Clock" is derived from the old French word alme or alarme, meaning "a call to arms", and the Latin word clocca, which means bell. The combination of these words gives us the term "Alarm Clock", which essentially means a bell that calls us to wake up.
Function
The Alarm Clock is typically fitted with a mechanism that triggers an alarm at a set time. This alarm can be in the form of a loud noise, music, or even light, depending on the type of alarm clock. The alarm continues until the person using the alarm clock turns it off or snoozes it for a certain period.
Types
There are various types of Alarm Clocks, including:
- Analog Alarm Clocks: These are traditional alarm clocks with an hour and a minute hand and a separate hand that is used to set the alarm.
- Digital Alarm Clocks: These are modern alarm clocks that display the time digitally and often come with additional features like radio, music player, and more.
- Smart Alarm Clocks: These are advanced alarm clocks that can be connected to smart devices and can be controlled through voice commands or mobile applications.
Related Terms
- Snooze Button: A feature on alarm clocks that allows the user to delay the alarm for a short period, typically 5-10 minutes.
- Sleep Cycle: A series of stages that the body goes through during sleep. Some advanced alarm clocks are designed to wake the user up at the optimal point in their sleep cycle.
- Wake-up Light: A type of alarm clock that uses light to gradually wake up the user, simulating a sunrise.
External links
- Medical encyclopedia article on Alarm clock
- Wikipedia's article - Alarm clock
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