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The complete assembly of motor and fan is mounted in a cylindrical safety grid fitted with two carrying handles.Īdditional features of the compact and rugged product include long-term stability, an individual calibration chart and a safety grid. When it comes to how loud something sounds, it’s a slightly different ballgame, but we can still understand it using the decibel scale. The motor is mounted on a cast aluminium base, shaped to minimize reflections. The motor is of the external rotor type, and due to the high moment of inertia of the rotor it has a very constant speed of rotation. The normal reference level is 10-12 W, which is the lowest sound persons of. Make sure you always have hearing protection, no matter how badass your car’s rig might be. Below that level, they are still able to cause permanent problems, including hearing loss and persistent tinnitus. Specialists recommend you use hearing protection whenever you are exposed to sounds above 85 dB. Both share the same unit of measure, the decibel (dB), and the term sound. Above 140 dB, sounds can cause humans physical distress: shortness of breath, nausea, nosebleeds, and other severe discomforts. The general rule is that all sound levels exceeding 85 decibels are not only very loud, but also harmful to human hearing and potentially dangerous. There is an additional 26 dB because the measurement is from a reference level of 1Pa instead of 20Pa, and there is 36dB additional rise in pressure due to.
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Reference Sound Source uses a specially designed centrifugal fan driven by a powerful asynchronous motor. Sounds above 80 dB and up to 110 dB are considered very loud.