Browsing by Author "Rapley B"

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    Acoustics and Biological Structures
    (InTechOpen, 2019-04-25) Alves-Pereira M; Rapley B; Bakker H; Summers S; Fellah, ZEA; Ogam, E
    Within the context of noise-induced health effects, the impact of airborne acoustical phenomena on biological tissues, particularly within the lower frequency ranges, is very poorly understood. Although the human body is a viscoelastic-composite material, it is generally modeled as Hooke elastic. This implies that acoustical coupling is considered to be nonexistent at acoustical frequencies outside of the human auditory threshold. Researching the acoustical properties of mammalian tissue raises many problems. When tissue samples are investigated as to their pure mechanical properties, stimuli are not usually in the form of airborne pressure waves. Moreover, since the response of biological tissue is dependent on frequency, amplitude, and time profile, precision laboratory equipment and relevant physiological endpoints are mandatory requirements that are oftentimes difficult to achieve. Drawing upon the viscoelastic nature of biological tissue and the tensegrity model of cellular architecture, this chapter will visit what is known to date on the biological response to a variety of different acoustic stimuli at very low frequencies.
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    Acoustics and biological structures
    (IntechOpen, 2018) Bakker H; Alves-Periera M; Summers S; Rapley B
    Within the context of noise-induced health effects, the impact of airborne acoustical phenomena on biological tissues, particularly within the lower frequency ranges, is very poorly understood. Although the human body is a viscoelastic- composite material, it is generally modeled as Hooke elastic. This implies that acoustical coupling is considered to be nonexistent at acoustical frequencies outside of the human auditory threshold. Researching the acoustical properties of mam- malian tissue raises many problems. When tissue samples are investigated as to their pure mechanical properties, stimuli are not usually in the form of airborne pressure waves. Moreover, since the response of biological tissue is dependent on frequency, amplitude, and time profile, precision laboratory equipment and relevant physi- ological endpoints are mandatory requirements that are oftentimes difficult to achieve. Drawing upon the viscoelastic nature of biological tissue and the tensegrity model of cellular architecture, this chapter will visit what is known to date on the biological response to a variety of different acoustic stimuli at very low frequencies.
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    Infrasound and low frequency noise guidelines: antiquated and irrelevant for protecting populations
    (The International Institute of Acoustics and Vibration, 11/07/2019) Alves-Pereira M; Krogh C; Bakker H; Summers S; Rapley B
    Over the past two decades, the increasing and unregulated production of infra- sound and low frequency noise (ILFN, ≤200 Hz) has led to a considerable rise in associated noise complaints and health-related issues. The most recent of such ILFN sources are industrial wind turbines (IWT). Acoustical field-data was collected within a home located in the vicinity of IWT, to which the AUC Rule 012 and its requirements were applied. In Ontario, IWT noise complaints were gathered under the Freedom of Information legislation. Goal: To explore the usefulness of current noise control rules when protecting human populations against ILFN generated by IWT.
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    Infrasound and Low Frequency Noise Guidelines: Antiquated And Irrelevant for Protecting Populations
    (The International Institute of Acoustics and Vibration, 1/01/2018) Alves Periera M; Krogh C; Bakker H; Summers S; Rapley B
    Over the past two decades, the increasing and unregulated production of infra- sound and low frequency noise (ILFN, ≤200 Hz) has led to a considerable rise in associated noise complaints and health-related issues. The most recent of such ILFN sources are industrial wind turbines (IWT). Acoustical field-data was collected within a home located in the vicinity of IWT, to which the AUC Rule 012 and its requirements were applied. In Ontario, IWT noise complaints were gathered under the Freedom of Information legislation. Goal: To explore the usefulness of current noise control rules when protecting human populations against ILFN generated by IWT.