RC Mark II: A refined procedure for rating the noise of heating, ventilating, and air-conditioning (HVAC) systems in buildings
About: This article is published in Noise Control Engineering Journal.The article was published on 1997-01-01. It has received 46 citations till now. The article focuses on the topics: Noise & HVAC.
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01 May 2003
TL;DR: In this paper, the authors provide a free-text for any format or medium provided that it is reproduced accurately and not used in a misleading context, and the material must be acknowledged as Crown copyright with the title and source of the publication specified.
Abstract: This publication (excluding the logo) may be reproduced free of charge in any format or medium provided that it is reproduced accurately and not used in a misleading context. The material must be acknowledged as Crown copyright with the title and source of the publication specified.
227 citations
Cites methods from "RC Mark II: A refined procedure for..."
...Later work (Blazier, 1997) developed a "Quality Assessment Index" for an HVAC noise through the balance of low, mid and high frequencies....
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TL;DR: In this article, the results of a wide acoustic environment survey were presented, where sound pressure measurements were carried out in a group of offices and the measurements lasted for five minutes and the resulting noise spectra were used to calculate the most significant acoustic parameters.
53 citations
12 Jan 2020
TL;DR: In this paper, the authors present the results of a literature survey that aimed to collect the indicators for the evaluation of occupants' health and comfort in indoor environmental quality evaluations, and highlight the differences between human health indicators and comfort indicators.
Abstract: Today, the effects of the indoor environment on occupants’ health and comfort represent a very important topic and requires a holistic approach in which the four main environmental factors (thermal comfort, air quality, acoustics, and lighting) should be simultaneously assessed. The present paper shows the results of a literature survey that aimed to collect the indicators for the evaluation of occupants’ health and comfort in indoor environmental quality evaluations. A broad number of papers that propose the indicators of a specific environmental factor is available in the scientific literature, but a review that collects the indicators of all four factors is lacking. In this review paper, the difference between indicators for the evaluation of risk for human health and for comfort evaluation is clarified. For each environmental factor, the risk for human health indicators are proposed with the relative threshold values, and the human comfort indicators are grouped into categories according to the number of parameters included, or the specific field of application for which they are proposed. Furthermore, the differences between human health and comfort indicators are highlighted.
38 citations
TL;DR: Investigation of differences in task performance and perception under six non-time-varying ventilation-type background noise spectra with differing tonality showed that performance scores did not change significantly across the six noise conditions, but there were differences in subjective perception.
Abstract: This research investigated differences in task performance and perception under six non-time-varying ventilation-type background noise spectra with differing tonality. The results were related to five indoor noise criteria systems: noise criteria, balanced noise criteria, room criteria, room criteria mark II, and the A-weighted equivalent sound pressure level (LAeq). These criteria systems are commonly used in the U.S. building industry, but concerns exist over whether they are appropriate for all noise situations. Thirty test subjects completed three types of performance tasks (typing, reasoning, and math) and answered questions about their perception of the indoor environment under each noise condition. Results showed that performance scores did not change significantly across the six noise conditions, but there were differences in subjective perception. For example, perception trends for tonality, annoyance, and distraction changed based on the frequency and prominence of discrete tones in noise. Howev...
38 citations
TL;DR: In this article, the A-weighted equivalent continuous sound pressure level (L Aeq ) and factors extracted from the autocorrelation function (ACF) were analyzed.
27 citations