For aircraft noise contour modelling, the main application of equation (2.7.17) is the standard metric Sound Exposure Level LAE (acronym SEL
– LAmax or SEL (sound exposure level) for protection during the night period in the event of noise peaks,
LAmax, or SEL (sound exposure level) for night period protection in the case of noise peaks,
– LAmax or SEL (sound exposure level) for protection during the night period in the event of noise peaks,
LAmax, or SEL (sound exposure level) for night period protection in the case of noise peaks,
Single event sound exposure level
→ Sound Exposure Level
Integrated sound level Otherwise termed → single event sound exposure level
Event sound/noise level A decibel measure of the finite quantity of sound (or noise) received from a passing aeroplane → sound exposure level
The method includes the steps of storing expected sound exposure levels for an aircraft in memory, and storing a sound exposure level limit for a navigation flight in memory.
The single event sound (or noise) exposure level is expressed exactly as
Noise that a worker is exposed to must not exceed the exposure standard for noise.
Noise exposure in the urban area less than 25 decibels
Less than 25 decibels noise exposure in the urban area
The time course of exposition to the noise is represented in a graphical form and can be analysed and verified when the highest level of exhibition to the noise takes place.
Hearing protectors lessen the noise exposure level and the risk of hearing loss.
Hearing protectors reduce the noise exposure level and the risk of hearing loss.
Hearing protectors reduce noise exposure and risk of hearing loss.
Hearing protectors will reduce the noise exposure level and the risk of hearing loss.
Hearing protection helps to reduce noise exposure level and the risk of hearing loss.
Among the participants, 190 students with a high level of recreational noise exposure were assigned to the exposure group, and 191 students with a low level of recreational noise exposure constituted the control group.
Therefore, the methods in this Standard can be less rigorously applied when the noise exposure level is either far above or far below the criterion level.
The exposure level equations above can be used to determine event levels when the entire time history of L(t) is known.
If it is necessary to speak very loudly to converse at one meter, the sound level probably exceeds 85 dBA[1].
With ISO 9612 an international standard is available on an engineering method for measurement of worker’s exposure to noise in a working environment and calculating the noise exposure level.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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