In an emergency, fire alarms are essential tools for protecting people and property. Their main job is to use a loud, obvious sound to warn residents of the presence of fire, smoke, or other hazardous situations. How, though, do fire alarms make this sound? The physics and engineering unde...
It’s good and necessary for a family to learn how to prepare for a fire. Here are some suggestions. Put a smoke alarm in the house. Smoke from a fire causes the alarm to go off. The alarm makes a loud sound. The sound tells everyone to leave the house at once. Make escape(...
There are several things a security system might do when it detects an intruder. In an advanced system, the control box will be wired to several different components. Typically, it will activate: a siren or other loud alarm noise flashing outdoor lights a telephone auto-dialer The siren and...
For people who are deaf or hard of hearing,it can be difficult to pick out important sounds,such as knocks at the door or fire alarms.Now researchers at the University of Washington have developed a smartwatch app called SoundWatch,which identifies sounds and reminds user...
than the speed of sound, so both the car and the horn are coming at you at 700 mph. All of the sound coming from the car "stacks up." You hear nothing, but you can see the car approaching. At exactly the same moment the car arrives, so does all of its sound and it's loud!
How effective are smoke alarms?Increasing use of smoke alarms is one of the reasons why there's been a long, steady fall in fire deaths over the last four decades since they first became popular. According to the US National Fire Protection Association (NFPA), the fire death rate is over...
All smoke detectors consist of two basic parts: a sensor to sense the smoke and a very loud electronic horn to wake people up. Smoke detectors can run off of a 9-volt battery or 120-volt house current. In this article, we will examine the two most common types of smoke detectors used...
All smoke detectors consist of two basic parts: a sensor to sense the smoke and a very loud electronic horn to wake people up. Smoke detectors can run off of a 9-volt battery or 120-volt house current. In this article, we will examine the two most common types of smoke detectors used...
Alarms and timers you set on your iPhone chime in a loud tone at the designated time. However, in situations such as when you’re in the office or don’t want to disturb people around you, you might want an alarm or timer that doesn’t go off like an emergency siren but rather aler...
Enhanced Safety: By providing clear and immediate visual cues, these alarms enhance personal safety during emergencies, whether at home or in public spaces. Customizable Settings: Users can often customize how and when they receive alerts, allowing for a personalized approach that suits their needs....