Kitchen timers with sound alerts

Sound signal

— the sound signal in kitchen timers is used to notify the completion of the set time and is a key function of the device. In mechanical timers, the signal is a loud metallic ring that triggers at the end of the spring mechanism's operation. It usually sounds sharp and continuous for several seconds, imitating the sound of a bell or alarm clock, and requires no power source. In electronic timers, the sound signal is emitted through a built-in piezo speaker. It may be softer in tone, often as a series of short peaks or continuous beeps. Some models allow for volume adjustment or signal type selection, and also have a repeat signal function (for example, every 30 seconds if not turned off manually).
The sound signal makes the timer especially convenient for the kitchen — it can be heard even at a distance or in the next room, which helps not miss an important moment in dish preparation.