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2. Acoustic shock - Wikipedia

   en.wikipedia.org/wiki/Acoustic_shock

   Acoustic shock. Acoustic shock is the set of symptoms a person may experience after hearing an unexpected, loud sound. The loud sound, called an acoustic incident, can be caused by feedback oscillation, fax tones, or signalling tones. Telemarketers and call centre employees are thought to be most at risk. [1]

3. Equal-loudness contour - Wikipedia

   en.wikipedia.org/wiki/Equal-loudness_contour

   Equal-loudness contour. An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. [1] The unit of measurement for loudness levels is the phon and is arrived at by reference to equal-loudness contours.

4. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Noise control is an active or passive means of reducing sound emissions, often for personal comfort, environmental considerations, or legal compliance. Active noise control is sound reduction using a power source. Passive noise control is sound reduction by noise-isolating materials such as insulation, sound-absorbing tiles, or a muffler rather ...

5. The best noise-cancelling earbuds in 2022 - AOL

   www.aol.com/best-noise-cancelling-earbuds-2022...

   We've listened to a lot of in-ear headphones to find out which models perform the best — here's our list of the top noise-cancelling earbuds you can buy right now. The best noise-cancelling ...

6. Loudness - Wikipedia

   en.wikipedia.org/wiki/Loudness

   Loudness. In acoustics, loudness is the subjective perception of sound pressure. More formally, it is defined as the "attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud". [ 1] The relation of physical attributes of sound to perceived loudness consists of physical, physiological and ...

7. Listener fatigue - Wikipedia

   en.wikipedia.org/wiki/Listener_fatigue

   Listener fatigue. Listener fatigue (also known as listening fatigue or ear fatigue) is a phenomenon that occurs after prolonged exposure to an auditory stimulus. Symptoms include tiredness, discomfort, pain, and loss of sensitivity. Listener fatigue is not a clinically recognized state, but is a term used by many professionals.