In contrast to electronic sirens the Quadrasonic™ sirens emit sinusoidal soundwaves which have gentler rise and fall times allowing the eardrum muscles have more time to adapt to the increase in volume levels. The sinusoidal sound waves are unlikely to cause hearing damage. The stereocilia are activated at a slower rate and are less stressed by the type of sound wave used in Quadrasonic Siren Systems.
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DIRECTIONAL EMERGENCY SIRENS Ltd
21 Wyndcote Rd Merseyside L18 2EB UK |
+44 (0)7964 269 350
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