Proposed Revision to Emission Limits of Structure-Borne Noise from Fixture Transmitted into Room: An Investigation of People's Annoyance
Abstract:In order to get more reasonable Emission Limits of Structure-Borne Noise from Fixture Transmitted into Room (ELSBNFTR), a subjective response experiment was carried out. In this experiment, the original samples (OS) were generated based on the current ELSBNFTR, while the adjusted samples (AS) were based on the proposed ELSBNFTR. Subjects were asked to make comparison between OS and AS on the basis of relative annoyance. The effect of Quality Assessment Index (QAI) on dealing with room noise complaints was discussed. As shown in the results, for each compared group, more than 72.0% of subjects chose "OS were more annoying than AS". The spectra of OS were more imbalanced, due to the higher proportion of low frequency noise energy, which led to a more rumbly character. It is proposed that QAI should be introduced into ELSBNFTR, in order to reduce complaints mainly caused by room noise (including structure-borne noise from fixture and background noise) with an imbalanced spectrum, while the structure-borne noise is still within ELSBNFTR. Besides, it is suggested that the evaluation of the difference values between room noise and background noise at different octave bands should be added in the procedure for the assessment of complaints, and 5 dB could be considered as a limit.
Document Type: Research Article
Publication date: 2011-11-01
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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