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The report "A Review of Published Research on Low Frequency Noise and its Effects" [54] contains a long list of research about exposure to high-level infrasound among humans and animals. For instance, in 1972, Borredon exposed 42 young men to tones at 7.5 Hz at 130 dB for 50 minutes.
Sound levels as low as 40 dB(A) can generate noise complaints [43] and the lower threshold for noise producing sleep disturbance is 45 dB(A) or lower. [ 44 ] Other factors that affect the annoyance level of sound include beliefs about noise prevention and the importance of the noise source, and annoyance at the cause (i.e., non-noise related ...
Frequent symptoms of SNHL are loss of acuity in distinguishing foreground voices against noisy backgrounds, difficulty understanding on the telephone, some kinds of sounds seeming excessively loud or shrill, difficulty understanding some parts of speech (fricatives and sibilants), loss of directionality of sound (especially with high frequency ...
Hyperacusis is an increased sensitivity to sound and a low tolerance for environmental noise. Definitions of hyperacusis can vary significantly; it often revolves around damage to or dysfunction of the stapes bone , stapedius muscle or tensor tympani ( eardrum ).
The Hum is persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada.
A prime example is steady-state or low-frequency noise as it is relatively easy to cancel. On the other hand, some high frequencies or impulse noise (i.e., sudden loud sounds) are more challenging ...
Vibroacoustic disease is a medical condition manifested in those who have had long-term exposure (≥ 10 yr) to large pressure amplitude (≥ 90 dB SPL) and low frequency noise (≤ 500 Hz). [1] The disease is said to lead to heart arrhythmia or even death. [2] [3] [4] [5]
Common symptoms include: Low-frequency sensorineural hearing loss. A feeling of fullness in the ear. Tinnitus (ringing in the ear). Diplacusis (the perception of sound being a different pitch in one ear). Hyperacusis (an intolerance to loud sounds). Depression or anxiety that the condition will worsen or progress to Meniere's disease.