Revised Criteria for Noise in Buildings
About: This article is published in Noise Control.The article was published on 1957-01-01. It has received 76 citations till now. The article focuses on the topics: Noise.
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TL;DR: To ensure inaudibility of the stage machinery, the limits refer to the quietest performance moments without stage machinery noise, music, speech, or other noise events, which help to refine the noise requirements for stage machinery in tender documents.
3 citations
01 Jul 1995
3 citations
Journal Article•
TL;DR: In this paper, the authors measured the noise pollution and its evaluation through the regulations of IRIB (Islamic Republic of Iran Broadcasting) server room to measure the acoustic noise characteristics of frequency and Sound Pressure Level (SPL).
Abstract: Acou stic experimental data of IRIB (Islamic Republic of Iran Broadcasting) server room was taken to measure the acoustic noise characteristics of frequency and Sound Pressure Level (SPL). The purposes of this paper are measuring the noise pollution and its evaluation through the regulations. The measurements were taken in two stages. The first one was taken at 10 points by Sound Investigator 2260 using ISO 3741: 1999(E) standard. The results indicate that IRIB server room is an acoustic noise polluted according to Iranian National Building Regulations. Measured data and its frequency analysis show that the high sound energy belongs to low frequencies in the server room. This is confirmed by the next stage of measurement. It was an hour long non-stop noise measurement in the server room to investigate noise exposure level by customers and employees. The Equivalent instant noise level on Aweighting network was 75 dBA. The results are valid for all of data centres, although this study is involved with a special case study. Two main factors are important in server room noise pollution scenario; the amount of sound absorbance in the space and environmental noise characteristics. Most surfaces in server rooms are hard and have low absorbance coefficient, therefore, the intensity of travelling sound increases. On the other hand, the main noise sources in any server room are fans which work usually on a narrowband with a fundamental frequency. So as the main features of server room acoustic noise are the same, the presented results can be generalized to any server room.
3 citations
TL;DR: In this paper , the A-weighted equivalent continuous sound pressure level (LAeq) and the factors evaluated using the autocorrelation function (ACF) were used to characterise low-level transient noises among several background sounds.
3 citations
TL;DR: In this paper, the authors discuss the design of acoustical devices such as microphones, loudspeakers, etc. and the principles for reduction of sound through partitions in rooms, etc., followed by a description of the behaviour of sound waves and vibrating bodies and an outline of human response to sound.
Abstract: Covers acoustic design from two main aspects: the design of acoustical devices such as microphones, loudspeakers, etc. and the principles for reduction of sound through partitions in rooms, etc. These sections are preceded by a description of the behaviour of sound waves and vibrating bodies and an outline of human response to sound. Finally, special problems in silencing and in the diagnostic use of sound are described
2 citations