These weighting curves aim to bring the digital and physical worlds closer together by allowing a computerised microphone-based system to hear like a human. This research led to the definition of a set of weighting curves: the so-called A, B, C and D weighting curves, which equalises a microphone’s frequency response. Researchers over the years have found that humans are most perceptive to sounds in the 1-6kHz range, although this range varies according to the subject’s physical health. Modelling perceived soundĭue to complexity of the fluidic mechanical construction of the human auditory system, low and high frequencies are typically not discernible. These nerve endings transform sound vibrations into electrical impulses that travel along the auditory nerve fibres to the brain for analysis. As the fluid moves, thousands of nerve endings are set into motion. The Cochlea (shown in purple) is filled with a fluid that moves in response to the vibrations from the oval window. These amplified sounds are then passed onto the Cochlea via the Oval window (not shown). The ear achieves this via three bones (Stapes, Incus and Malleus) that act as a mechanical amplifier for vibrations received at the eardrum. COVID Buzzer tested at Johan Cruijff ArenA.Covid Buzzer tourism, institutions and restaurants. ![]()
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