• Corpus ID: 44031760

The Impact of A-weighting Sound Pressure Level Measurements during the Evaluation of Noise Exposure

  title={The Impact of A-weighting Sound Pressure Level Measurements during the Evaluation of Noise Exposure},
  author={Richard L St Pierre and Daniel Joseph Maguire},
Over the past 50 years, the A-weighted sound pressure level (dBA) has become the predominant measurement used in noise analysis. This is in spite of the fact that many studies have shown that the use of the A-weighting curve underestimates the role low frequency noise plays in loudness, annoyance, and speech intelligibility. The intentional de-emphasizing of low frequency noise content by A-weighting in studies can also lead to a misjudgment of the exposure risk of some physical and… 

Figures from this paper


Because of physical and psychological effects, hearing damage, in the main concern of safety regulations, should not be neglected. There are provable psychological reactions (strain, anger) and

Use of Helmholtz resonators for noise attenuation

Acoustics is the only category in which a LEED-rated office building performs worse than a conventional building. The exposed hard surfaces and the lack of partitions cause easy propagation of

Low Frequency Noise from Transportation Sources

Low frequency noise (LFN) is common as background noise in urban environments and as an emission from many artificial sources: road vehicles, aircraft, industrial machinery, artillery and mining

Subjective Estimation of Airborne Sound Insulation

This study explores airborne sound insulation as an objective and subjective measure. The concept of this study starts with a hypothesis that there is a need to assess airborne sound insulation in

Noise Reduction in the Cab of a Special Vehicle

Noise is highly associated with adverse effects on health, the human psyche and performance. Current special vehicles do not possess sufficient technologies to suppress the transmission of noise or

Understanding and improving the perception of a hospital ward soundscape

The various aspects of hospital environments have been shown to affect individuals psychologically and physiologically. One aspect of this, sound, has been thoroughly documented through acoustic

The effects of physical vibration on heart rate variability as a measure of drowsiness

Characteristic changes in heart rate variability (HRV) domains that indicated progressively increasing neurological effort in maintaining alertness in response to low frequency vibration, which becomes significant within 30 min are found.

Helmholtz Resonators in open office acoustics

  • Physics
  • 2020
Acoustics is the only category in which a LEED-rated office building performs worse than a conventional building. The exposed hard surfaces and the lack of partitions cause easy propagation of



Evaluation of loudness-level weightings for assessing the annoyance of environmental noise.

In terms of correlation with subjective judgments of annoyance-not loudness-the LLSEL formulation performs much better than do the loudness calculations, which is true across a range of sources that includes aircraft, helicopters, motor vehicles, trains, and impulsive sources.

The Effects of Broadband, Tonal and Masked Ventilation Noise on Performance, Wakefulness and Annoyance

Comparisons between the masked ventilation noise and the tonal ventilation noise masked by means of a pink noise showed that the Masked ventilation noise was correlated to ambiguous tendencies towards higher performance, lower fatigue but higher annoyance.

Sources and effects of low-frequency noise.

Evidence suggests that a number of adverse effects of noise in general arise from exposure to low-frequency noise: Loudness judgments and annoyance reactions are sometimes reported to be greater for low- frequency noise than other noises for equal sound-pressure level.

Low frequency noise "pollution" interferes with performance.

The results suggest that the quality of work performance and perceived annoyance may be influenced by a continuous exposure to low frequency noise at commonly occurring noise levels and subjects categorised as high-sensitive to low Frequency noise may be at highest risk.

Why can a decrease in dB(A) produce an increase in loudness?

The analysis shows that loudness patterns produced in the auditory system by the tone-noise complex can account for the observed effects and shows that the A-weighting and the loudness of the complex are negatively related.

Temporary Threshold Shift in Hearing from Exposure to Different Noise Spectra at Equal dBA Level

The intent of this study was to determine whether sound‐level measurements in dBA could adequately depict harmfulness to hearing from exposures to noises differing widely in spectra. Each of 11 male

Loudness Assessment of Band Noise of Varying Bandwidth and Spectral Shape. An Evaluation of Various Frequency Weighting Networks

The ability of different evaluation methods to predict loudness was assessed. In Experiment I, 12 subjects matched a band noise (900–1060Hz) to equal the loudness of each of 45 different noises

Effects of occupational exposure to low frequency noise on cognition.

It is suggested that prolonged exposure to LPALF noise might contribute to cognitive impairment and that the P300 event-related brain potential recording may be a valuable diagnostic tool.

Changes in Wakefulness during Exposure to Noise at 42 Hz, 1000 Hz and Individual EEG Frequencies

The results of the investigation did not show any significant proofs for the theory that drowsiness is influenced by a synergetic correlation between sound waves and sound coordinated EEG.

Loudness , Its Definition , Measurement and Calculation

OUDNESS is a psychological term Used to describe the magnitude of an auditory sensation. Although we use the terms "very loud," "loud," "moderately loud," "soft" and "very soft," corresponding to the