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Not only are hair dryers inherently loud devices, they are also utilised extremely close to our ears. These two factors enhance the chances of causing annoyance amongst users and exposes them to an even greater health risk, the loss of hearing. In order to minimise these, efforts should be drawn to reducing high frequency tonalities produced by the shape and air pressure, commonly known as ‘sharpness’, as human ear is most sensitive to that range. Propellers should produce a smooth sound too, avoiding inconsistencies that could make the user feel as if their appliance is struggling to complete its task.

Sound Made Simple

Acoustics Academy’s Sound Made Simple guide clarifies complex acoustic terminology with insights to design with sound.