Showing papers on "Annoyance published in 1995"

Aircraft noise, hearing ability, and annoyance

Abstract: The relationship between aircraft noise, loss of hearing, and annoyance was explored in a study in two schools located near an international airport in Taiwan. Sixth-grade students (N = 242) were recruited from two schools and were classified into high-and low-noise-exposure groups, based on environmental noise measurements. Personal-equivalent 24-h noise exposure was measured to determine noise exposure at the individual level, and it was compared with hearing threshold level and with aircraft noise measured at the environmental level. Individual hearing threshold levels did not differ between environmental high- and low-noise-exposure groups, as evidenced by the lack of difference between the two groups for noise exposure measured at the individual level. However, the proportion of students who were annoyed by aircraft noise was higher in the environmental high-noise-exposure group, although personal 24-h noise exposure was not a factor for annoyance. The results indicated that environmental no...

Community Noise Edited by

Abstract: The document critically reviews the adverse effects of community noise, including interference with communication, noise-induced hearing loss, annoyance responses, and effects on sleep, the cardiovascular and psychophysiological systems, performance, productivity, and social behavior. Noise measures or indices based only on energy summation are not enough for the characterization of most noise environments. This is particularly true when concerned with health assessment and predictions. It is equally important to measure and display the maximum values of the noise fluctuations, preferably combined with a measure of the number of noise events, and to assess whether the noise includes a large proportion of low frequency components. For dwellings, recommended guideline values inside bedrooms are 30 dB LAeq for steady-state continuous noise and for a noise event 45 dB LAmax. To protect the majority of people from being seriously annoyed during the daytime, the sound pressure level from steady, continuous noise on balconies, terraces, and in

Annoyance and Discomfort during Exposure to High-Frequency Noise from an Ultrasonic Washer

Abstract: Annoyance and discomfort during exposure to high-frequency noise from an ultrasonic washer have been examined in the experiments carried out with 10 subjects. After a short exposure during which the subjects rated their annoyance and discomfort, a broad-band noise was matched to the ultrasound. The subjects were exposed to three different levels of ultrasound on three different occasions. Analyses showed that ultrasound causes considerable annoyance and discomfort even for the lowest exposure levels. No significant difference between annoyance and discomfort was observed. The matchings indicated, however, that the A-weighting, i.e., the traditional rating technique used for noise evaluations, overestimated the high-frequency sound when evaluating annoyance and discomfort.

Choice of frequency weighting for the evaluation of weapon noise

Abstract: This paper describes a laboratory study to choose an appropriate frequency weighting network for predicting the annoyance caused by the noise from small, medium, and large weapons. The results indicate that the annoyance of all three weapon types is the same if the blasts are heard at identical A‐weighted SEL’s. On the other hand, equal C‐weighted SEL’s result in large differences in annoyance between the weapon types. The implications of these results for outdoor noise criteria depend on the assumption concerning window condition. If one assumes that people hear the blasts predominantly through open windows, then A‐weighted criteria should be appropriate for all the weapon types without any correction (penalty or bonus) for weapon type. On the other hand, if the blasts are heard predominantly through closed windows a penalty of about 5 dB should be applied to the outdoor levels of the large weapons to account for the poorer low‐frequency attenuation of the windows.

Traffic noise and annoyance

Abstract: Describes a socio‐psychological study performed in a residential area of Tehran, exposed to both aircraft and traffic noise. Analysis of residents′ responses to road traffic noise shows that although aircraft noise is the chief environmental problem it fails to mask the nuisance of traffic noise.

Charakterisierung von Geruchsbelästigung. III: Nationale Regelungen : Lösungsansätze und vorhandene Wissenslücken

Abstract: This three-part report on the characterization of odour annoyance draws a balance of the past endeavour to objectify the determination of an existing or an expected, however subjectively experienced annoyance caused by odorants in ambient air. The main subject will be technical prescriptions such as standards and guidelines (e.g. VDI Guidelines), but administrative regulations are also dealt with such as ordinances on air pollution prevention in various countries. Part 1 reported on the present German guidelines on methods to determine individual odour parameters; Part 2 dealt with the main topic of this contribution, which is the evidence of correlations between individual parameters and odour annoyance reactions. Part 3 explains the approach of the administration of three European countries to solve the pertinent problems on the basis of existing knowledge and well-known gaps regarding these correlations