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A rule of thumb is that the louder the sound, the less time you should listen to it for. Exposure to loud music can lead to a range of hearing problems such as noise-induced hearing loss, tinnitus and hyperacusis. Here are some commonly quoted comparisons of sound levels: 0 dB(A) - the lowest sound level a person with normal hearing can detect [4]
In modern recording, this range is often limited through dynamic range compression, which allows for louder volume, but can make the recording sound less exciting or live. [50] The dynamic range of music as normally perceived in a concert hall does not exceed 80 dB, and human speech is normally perceived over a range of about 40 dB. [28]: 4
Sound measurement apps can help one find out how loud sounds are. If not measuring the sound levels, a good rule of thumb is that sounds are potentially hazardous if it is necessary to speak in a raised voice to be heard by someone an arm's length away. Moving away from the sound or using hearing protection are approaches to reduce exposure levels.
Auditory sensitivity changes when the duration of a sound becomes less than 1 second. The threshold intensity decreases by about 10 dB when the duration of a tone burst is increased from 20 to 200 ms. For example, suppose that the quietest sound a subject can hear is 16 dB SPL if the sound is presented at a duration of 200 ms.
I 0 is the reference sound intensity; 1 Np = 1 is the neper; 1 B = 1 / 2 ln(10) is the bel; 1 dB = 1 / 20 ln(10) is the decibel. The commonly used reference sound intensity in air is [5] = /. being approximately the lowest sound intensity hearable by an undamaged human ear under room conditions.
Quiet ($25): Up to 26 decibels SNR of ... designed to reduce noise from loud events, like music festivals ... foam earplugs $10, which have 33 decibels SNR or 30 NRR of noise reduction ...
The intensities displayed on the audiogram appear as linear 10 dBHL steps. However, decibels are a logarithimic scale, so that successive 10 dB increments represent greater increases in loudness. For humans, normal hearing is between −10 dB(HL) and 15 dB(HL), [2] [3] although 0 dB from 250 Hz to 8 kHz is deemed to be 'average' normal hearing.
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