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Outline

Title
Abstract
Present Study
Methods 2.1 Subjects
Analysis of Recordings and Selection of Stimuli
Results
Summary of Individual Results
Discussion 4.1 Measured Noise Levels
Evaluation of Individual Cases
Summary of Evaluations
Generalization of the Findings
Measurement Methods
Conclusion
References
All Topics
Engineering
Mechanical Engineering

A Detailed Study of Low-Frequency Noise Complaints

Profile image of Kerstin Persson WayeKerstin Persson Waye

2008, Journal of Low Frequency Noise, Vibration and Active Control

https://doi.org/10.1260/026309208784425505
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33 pages

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Abstract

From 203 cases of low-frequency complaints a random selection of twenty-one cases were investigated. The main aim was to answer the question whether the annoyance is caused by an external physical sound or by a perceived but physically non-existing sound, i.e. low-frequency tinnitus. Noise recordings were made in the homes of the complainants, and the complainants were exposed to these in blind test listening experiments. Furthermore, the low-frequency hearing function of the complainants was investigated, and characteristics of the annoying sound were matched. The results showed that some of the complainants are annoyed by a physical sound (20–180 Hz), while others suffer from low-frequency tinnitus (perceived frequency 40–100 Hz). Physical sound at frequencies below 20 Hz (infrasound) is not responsible for the annoyance -or at all audible – in any of the investigated cases, and none of the complainants has extraordinary hearing sensitivity at low frequencies. For comparable cases...

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Morten Lydolf

2000

A survey of complaints about infrasound and low frequency noise has been carried out. 167 persons reported about their annoyance in a questionnaire. Their verbal reports often describe the sound as deep and humming or rumbling, like coming from a distant idling engine of a truck or pump. Nearly all respondents report of a sensory perception from the sound. In general they report that they perceive it with their ears, but many mention also a perception of vibrations, either in their body or of external objects. The sound disturbs and irritates during most activities, and many consider its mere presence as a torment to them. Many of the respondents report on secondary annoyance in terms of various kinds of unpleasantness (e.g. insomnia, headaches, palpitation), which they associate with the sound mainly because it occurs at the same places as the sound. In a majority of the cases, only a single or few persons can hear the sound, but there are also examples where it is claimed to be audible to everybody. Typically, measurements have shown that existing limits (and hearing thresholds) are not exceeded. The investigation leaves the key question: Is the annoyance induced by an external sound or not, and if it is, which frequencies and levels are then involved. The feasibility of a study of this is supported by the results.

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Assessment of annoyance from low frequency and broadband noises
Małgorzata Waszkowska

International journal of occupational medicine and environmental health, 2003

It has been shown that low frequency noise (LFN), defined as broadband noise with dominant content of low frequencies (10-250 Hz), may be annoying to exposed subjects. The aim of the study was to compare the degree of annoyance caused by LFN with that caused by broadband noise (BBN) without dominant low frequency components at similar A-weighted sound pressure levels. Subjects included in the study were 145 male employees of the control rooms. They were exposed to noise through headphones at gradually increasing dB A-weighted sound pressure levels within the range of 62-84 dB. Annoyance rating was based on a 100-score graphical scale. LFN was rated as significantly more annoying than BBN at the comparable A-weighted sound pressure levels. The annoyance assessment of either noise did not depend on age, length of employment or the level of exposure to noise at a current workplace. LFN represents a higher risk of influencing human well-being than regular BBN and should be considered in...

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An Experimental Evaluation of Annoyance Due to Low Frequency Noise
Kerstin Persson Waye

Journal of Low Frequency Noise, Vibration and Active Control, 1985

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Related topics

  • Mechanical Engineering
  • Psychology
  • Acoustics
  • Low Frequency Noise

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    The Spectral Extent of Phasic Suppression of Loudness and Distortion-Product Otoacoustic Emissions by Infrasound and Low-Frequency Tones
    Marcelo Larrea

    Journal of the Association for Research in Otolaryngology

    We investigated the effect of a biasing tone close to 5, 15, or 30 Hz on the response to higher-frequency probe tones, behaviorally, and by measuring distortion-product otoacoustic emissions (DPOAEs). The amplitude of the biasing tone was adjusted for criterion suppression of cubic DPOAE elicited by probe tones presented between 0.7 and 8 kHz, or criterion loudness suppression of a train of tone-pip probes in the range 0.125–8 kHz. For DPOAEs, the biasing-tone level for criterion suppression increased with probe-tone frequency by 8–9 dB/octave, consistent with an apex-to-base gradient of biasing-tone-induced basilar membrane displacement, as we verified by computational simulation. In contrast, the biasing-tone level for criterion loudness suppression increased with probe frequency by only 1–3 dB/octave, reminiscent of previously published data on low-side suppression of auditory nerve responses to characteristic frequency tones. These slopes were independent of biasing-tone frequen...

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    On the Effectiveness of airborne infrasound in eliciting vestibular-evoked myogenic responses
    carlos quinto jurado

    Journal of Low Frequency Noise, Vibration and Active Control, 2019

    The use of airborne infrasound and other stimuli to elicit (cervical) vestibular-evoked myogenic potentials (cVEMPs) was studied to address the common proposition that infrasound may efficiently stimulate the vestibular system, an effect which may underlie the so-called wind-turbine syndrome. cVEMPs were measured for both ears of 15 normal-hearing subjects using three types of airborne sound stimulation: (1) 500-Hz tone bursts (transient); (2) 500-Hz sinusoidally amplitude-modulated tones at a 40-Hz rate (SAM); and (3) low-frequency and infrasound pure tones (LF/IS). The two former stimulation types served as control and allowed a systematic comparison with (3). It was found that SAM stimulation is effective and appears to be comparable to transient stimulation, as was previously observed in a yet small number of studies. Although the vestibular system is reported to be highly sensitive to low-frequency mechanical vibration, airborne LF/IS stimulation at ∼80–90-phon loudness levels ...

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