In an initial study, participants who used alarms that carry a tune reported less grogginess ('sleep inertia') than those using the traditional beeping alarm sound. A second study, the scientists ...

7 Prompt modes: The paging system has buzzer, vibration and flash modes,and you can combine them. Customer can note the alert the beep sound even at noisy enviroments Durable Construction ...

after technicians confirmed they had fixed a fault causing a lighthouse's fog alarm to sound non-stop for about a week. The high-pitched electronic beep noise had been heard coming from Longships ...