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IL is not equal to SPL. Actually SPL = IL + 0.16dB.
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∙ 12y ago
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How do you convert from db HL to db SPL?
dB SPL is a comparison of a sound level to what was thought to be the threshold of hearing, although today it is known that the value was too high. dB HL is a measure of hearing loss - a comparison of a subjects hearing compared to a 'normal' standard. As they are measure different things a direct comparison is not possible. The differences between dB HL and dB SPL, arise from isophonic curves. There is no direct (linear) formula to convert this but a set of formulas. For different frequencies, different values should be added. For eg., at 1kHz you can state that 0dB HL is around 2dB SPL while at 250Hz, 0dB HL is 12 dB SPL. db HL = db Hearing Level db SPL = db Sound Pressure Level
What is 0 db IL?
The sound being measured is equal to the reference value.
What is the decibel of a whisper?
About 20 dB SPL (sound pressure level).
What is the minimum intensity a sound can have?
The minimum of sound intensity can be theoretically as low as zero decibels. But you seem to mean what the human threshold of hearing is. That reference sound intensity is 10^−12 W/m² equal to 0 dB sound intensity level. Our eardrums are moved by the sound pressure. The reference sound pressure at the human threshold of hearing is po = 20 µPa equal to 0 dB sound pressure level (SPL).
What is the maximum intensity of sound which is ear can hear?
The ear drums are moved by the sound pressure deviations only. Therefore don't ask for sound intensity. Sound pressure is measured by an SPL meter. Very loud noise is aching. The "threshold of pain" has the value of about 130 dB Sound Pressure Level (SPL). "Permitted Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless There are accepted standards for recommended permissible exposure time for continuous time weighted average noise, according to NIOSH (National Institute for Occupational Safety and Health) and CDC (Centers for Disease Control and Prevention) in 2002. For every 3 dBs over 85 dB, the permissible exposure time before possible damage can occur is cut in half.
What is the difference between dB HL and dB SPL?
dB HL stands for decibel Hearing Level, and dB SPL stands for decibel Sound Pressure Level.
How do you convert from db HL to db SPL?
dB SPL is a comparison of a sound level to what was thought to be the threshold of hearing, although today it is known that the value was too high. dB HL is a measure of hearing loss - a comparison of a subjects hearing compared to a 'normal' standard. As they are measure different things a direct comparison is not possible. The differences between dB HL and dB SPL, arise from isophonic curves. There is no direct (linear) formula to convert this but a set of formulas. For different frequencies, different values should be added. For eg., at 1kHz you can state that 0dB HL is around 2dB SPL while at 250Hz, 0dB HL is 12 dB SPL. db HL = db Hearing Level db SPL = db Sound Pressure Level
How loud is 60 db?
60 dB sound pressure level is about conversational speech listened in 1 meter distance.
Does loudness hurt?
It depends on how loud it is. In hearing, the threshold of pain is the sound pressure or sound pressure level beyond which sound becomes unbearable for a human listener. This threshold varies only slightly with frequency. Different values for the threshold of pain are found in the literature: Here are some sound pressure levels SPL in dB and the sound pressure in pascals of the sensed possible threshold of pain: SPL 120 dB = 20 Pa SPL 130 dB = 63 Pa SPL 134 dB =100 Pa SPL 137.5 dB =150 Pa SPL 140 dB =200 Pa
What is 0 db IL?
The sound being measured is equal to the reference value.
What is the average sound level?
The usual soundlevel can be between 0 dB SPL = 20 µPa (threshold of hearing) up to 130 dB SPL (threshold of pain). An average sound level could be at 85 dB SPL. Scroll down to related links and look at "Average sound pressure levels".
What is the dB rating for pain threshold?
If you mean the sound pressure level that causes pain, it is about 120 dB SPL.
What is the decibel of a whisper?
About 20 dB SPL (sound pressure level).
What is the difference between dB SPL and dB SL?
There are several types of dB. dB SPL are decibels measuring sound pressure levels. There is an accepted reference point of 0 dB SPL which equals 20 micropascals = 2 × 10-5 pascals. dB SL are decibels measuring a signal relative to an individuals auditory threshold. For example, if a person's minimum threshold is 30 dB HL (yet another type of decibel measuring how much worse a person's hearing is based on a referential dB level) and a signal is at 40 dB HL, the sensation level of this signal to this individual is 10 db SL (40 dB - 30 dB = 10 dB SL).
What SPL is the threshold of pain?
130 dB is an SPL commonly considered to be the threshold of pain. Between 120 and 140. http://ccrma-www.stanford.edu/~jos/st/DB_SPL.html
How many times louder is 100 dB that 10 dB?
A 10 dB sound pressure level (SPL) is 0.000063 pascal and 100 dB is 2 pascal. Loudness is a problematic psycho acoustic feeling. I don't know what three times louder really means.
Human ear is sensite to sound intensity ranging from db?
The human is is not sensitive to sound intensity (energy), but the human ear is sensitive to sound pressure or to sound pressure level (SPL). It is ranging from 20 micropascals to 150 pascals, that is a SPL of 0 dB (threshold of hearing) to 137.5 dB (threshold of pain). Scroll down to related links and look at "Table of Sound Levels and corresponding Sound Pressure".
