Sounders and sirens are used to attract attention particularly when an immediate response is required. To alert a person, it is recommended that a sounder or siren reaches between 5 and 15 dB(A) louder than the background noise of the given area. There are several things to consider before selecting a sounder or a siren: The sound pressure level achieved […]
Motor driven sirens are a typical style of an audible signal. They work by the motor driving a bladed impeller, pulling in air and pushing it back out through vents to produce a whirring sound – similar to an air raid siren. These units are commonly used in remote areas where a distinct noise it required to warn of an […]
Your bedside alarm clock may be far from your best friend, but it serves a purpose – to wake you up. This is a very simple example of an audible signal – audible warning signals and audible alarms are on a completely different scale, which is why it’s important to know the different types of audible warning signals available. Types […]
Hearing is one of the most important senses a man can have. It allows a person to hear sounds through the mechanical waves that are transmitted and stimulates the hearing organs. Each of the Earth’s components and everything that is in it including plants, animals and humans can create sounds that are unique from each other. Man creates sounds […]
We are always surrounded by a sea of sound. There is not a minute of the day when we cannot hear some sound. To get an idea of how big and important a part of sound plays in our lives, imagine what the world would be like without sound. Imagine yourself on a busy street where traffic moves silently, […]