A high-frequency noise reduction device could take a variety of forms with a wide range of requirements. Design requirements for the three primary categories of solutions- an earpiece, a hand piece attachment, and a room-scale solution- are summarized in the figure below. All viable
solutions must attenuate frequencies in the range of 3-6 kHz, which is the most common frequency range of hearing deficits in dental professionals.10 In order to be effective, each solution should have the attenuation power to produce at least 45% decibel reduction at high frequencies and less than 5% reduction at speech frequency.
solutions must attenuate frequencies in the range of 3-6 kHz, which is the most common frequency range of hearing deficits in dental professionals.10 In order to be effective, each solution should have the attenuation power to produce at least 45% decibel reduction at high frequencies and less than 5% reduction at speech frequency.