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Aircraft Noise Annoyance and Average versus Maximum Noise Levels
Archives of Environmental Health: An International Journal, 1992A questionnaire study was performed in seven areas located around the airports of Landvetter and Save, Gothenburg, in an attempt to elucidate the extent of annoyance in populations exposed to aircraft noise. Noise exposure was estimated as the energy equivalent level (Aircraft Noise Level--FBN) or as the number of aircraft with levels that exceeded 70 ...
M, Björkman, U, Ahrlin, R, Rylander
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A noise pollution level instrument
Review of Scientific Instruments, 1973Noise pollution level is an index of the annoyance and objectionability of noise which has recently been drawing increasing interest. It is based on two quantities, one relating to the equivalent continuous energy level and the other relating to the variations in level.
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Safe Level for Noise Exposure?
Annals of Otology, Rhinology & Laryngology, 1976The safety of long, continuous exposure to several different levels of noise was determined. Chinchillas were exposed for two or nine days to an octave band of noise with a center frequency of .5 kHz or 4 kHz. By examining the inner ear for evidence of acute cellular degeneration, exposures which produced minimal permanent damage could be identified ...
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Noise Levels in Physiciansʼ Offices
Ear and Hearing, 1990The development of hand-held auditory screening devices has led to increased hearing screening by physicians. Ambient noise levels were assessed in examination rooms of 20 physician offices. Measurements provided Ln, Leq, Lmax, and octave band data for specialty types: pediatrics, internal medicine, family practice and otolaryngology.
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Maximum noise levels in road traffic noise
Journal of Sound and Vibration, 1988Certain field investigations have shown that the correlation between the extent of annoyance due to road traffic noise and the noise dose expressed in leq is rather poor. A higher correlation was found when the expression of the noise dose was based upon the maximum noise level (mnl) from the single noisiest event. To determine the relation between leq
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Noise limits and noise levels along motorways in Europe
The Journal of the Acoustical Society of America, 2008Environmental noise caused by traffic is one of the main local environmental problems in Europe. The National Road Authorities (NRA's), combined in the Conference of European Directors of Roads (CEDR), are aware of the environmental noise problem along their motorways.
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Review of Scientific Instruments, 1980
A simple, high-precision technique for measuring the rms value of noise signals is described. The technique is based on a statistical theory relating the number of threshold crossings of a noise signal to its variance.
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A simple, high-precision technique for measuring the rms value of noise signals is described. The technique is based on a statistical theory relating the number of threshold crossings of a noise signal to its variance.
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Adaptive noise level estimator
The Journal of the Acoustical Society of America, 2005The method involves adopting a definable initializing noise level estimate, determining further estimate values from the minimum of the maximum value of an input signal (x(k)) sampled at preferably equidistant intervals over a short period, adopting the value if the input signal dynamic variation is below a definable threshold (epsilon) and adopting ...
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