Sound source measurement by using a passive sound insulation and a statistical approach

2015 ◽  
Vol 354 ◽  
pp. 278-295 ◽  
Author(s):  
Raffaele Dragonetti ◽  
Sabato Di Filippo ◽  
Francesco Mercogliano ◽  
Rosario A. Romano
Keyword(s):  
Sound Source ◽  
Statistical Approach ◽  
Sound Insulation

Application Analysis of Small Sound Barrier on Soundproof Windows under Line and Point Sound Sources

2013 ◽  
Vol 291-294 ◽  
pp. 1107-1112
Author(s):  
Yi Bin Lei ◽  
Mei Jun Jin
Keyword(s):  
Sound Source ◽  
Traffic Noise ◽  
Sound Insulation ◽  
Traffic Flows ◽  
Residential Areas ◽  
Sound Sources ◽  
Sound Barrier ◽  
Application Analysis ◽  
Sound Barriers ◽  
Sound Environment

Traffic noise can be classified as point and line sources according to different traffic flows. Intakes on bay windows and small sound barriers are always used to reduce the influences of traffic noise on high buildings along streets and improve sound environment in these residential areas. Through the studies of the diffraction sound attenuation difference curves of small barriers in point and line sound source conditions, this article aims at providing with not only feasible soundproof solutions and theoretical directions for the choice of sound insulation products, but also with theoretical bases for the research and exploration of acoustic proof windows. His template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

scholarly journals Evaluation Method for Façade Acoustic Insulation for a Corner Room: Discussion on the Results Obtained as a Function of the Source Position

2020 ◽  
Vol 10 (21) ◽  
pp. 7434
Author(s):  
Nicola Granzotto ◽  
Edoardo Alessio Piana
Keyword(s):  
Sound Source ◽  
Evaluation Method ◽  
International Standards ◽  
Sound Insulation ◽  
Source Position ◽  
Noise Levels ◽  
Acoustic Attenuation ◽  
Acoustic Insulation ◽  
Building Facades ◽  
The Individual

The appropriate acoustic insulation project of building façades is of importance for the design of highly comfortable living environments. In some countries, national regulations require maximum noise levels inside rooms, or minimum sound insulation limits, to be respected. The acoustic insulation design of a façade is usually performed according to the ISO 12354-3 standard, which presents a calculation method based on the geometry of the room, the shape of the façade, the areas and the acoustic performances of the individual elements. The prescribed limits must be experimentally verified according to methods derived from international standards. However, the current versions of such standards do not provide details on how to perform the measurements and the calculation of the sound insulation for corner rooms. An important remark is that, depending on the position of the sound source used for the measurements, different results of the standardized sound insulation are obtained. This article proposes a new method for calculating the façade insulation of corner rooms by introducing the acoustic attenuation due to the diffraction of the corner and the distance of the sound source from the façades, estimated through simulations and experimentally validated.

scholarly journals Influence estimation of the inclination angle of the top of the noise protection barrier on its efficiency

2021 ◽  
Vol 1 (1(57)) ◽  
pp. 12-16
Author(s):  
Vitaly Zaets
Keyword(s):  
Inclination Angle ◽  
Sound Source ◽  
Sound Field ◽  
Wide Frequency Range ◽  
Sound Insulation ◽  
Frequency Range ◽  
Noise Barriers ◽  
Sound Sources ◽  
Sound Levels ◽  
Number Of Publications

The object of research is the sound field from linear sound sources around a rounded noise barrier of the same height and different angles of inclination of the top part of the barrier. It is known that the effectiveness of noise protection barriers depends primarily on the geometric dimensions of the barrier and the relative position of the sound source, barrier and area of noise protection. A large number of publications have been devoted to the study of the influence of these factors and some others, such as the influence of the earth's surface, sound absorption, sound insulation of the barrier. However, these works did not study the effect of the angle of the top part of the barrier on the change in the barrier efficiency. In this paper, the reduction of sound levels from linear sound sources around noise barriers with different inclination angle of the top part of the barrier is investigated. Rounded barriers of the same height with different radii are considered, which made it possible to simulate barriers in which the top part of the barrier has a different inclination angle. An effectiveness of such barriers for various locations of the sound source, which could also affect the establishment of a pattern of changes in the effectiveness of barriers, is also considered. In addition, the results were analyzed over a wide frequency range. The calculation of the field around such a barrier was carried out using computer simulation using the finite element method. This method allows to easily change the geometric parameters of the barrier and the position of the sound source. The barriers were considered acoustically hard. Thus, an influence of the inclination angle of the top part of the barrier on the sound field around the barrier from various locations of sound sources in a wide frequency range is analysed. The results must be taken into account when designing noise barriers to reduce noise levels from traffic flows

Experimental Visualization of Sound Pressure Level and Vibration Around a Soundproof Barrier

2011 ◽  
Author(s):  
Fumio Shimizu ◽  
Kazuhiro Tanaka ◽  
Koji Yamamoto ◽  
Hiroshi Shigefuji
Keyword(s):  
Noise Reduction ◽  
Sound Pressure Level ◽  
Sound Source ◽  
Sound Pressure ◽  
Pressure Level ◽  
Heat Radiation ◽  
Sound Insulation ◽  
Vibration Displacement ◽  
The One ◽  
The Relationship

The noise and vibration control are the one of important issues. A soundproof barrier, which covers a sound source with sound absorbing materials, is very useful for the noise reduction. When large noise and high temperature heat emit from the sound source, we must also consider the heat radiation as well as the noise reduction. The purpose of the present study is to investigate the relationship between sound pressure level and vibration on a soundproof barrier around a sound source. The effect of heat radiation hole on the sound insulation performance of the soundproof barrier is also investigated. The sound pressure level and the vibration displacement were similarly distributed on the surface of the barrier. Therefore, the vibration of the barrier was strongly influenced to the sound pressure level of the transmitted sound.

Role of pinnae and head movements in localizing pure tones 1The authors would like to thank Mr. Remi Humbert for implementing the experiment in Turbo Pascal and for his further assistance.

1999 ◽  
Vol 58 (3) ◽  
pp. 170-179 ◽  
Author(s):  
Barbara S. Muller ◽  
Pierre Bovet
Keyword(s):  
Sound Source ◽  
Head Movement ◽  
Movement Analysis ◽  
Head Movements ◽  
Sound Sources ◽  
Localization Accuracy ◽  
Sound Effects ◽  
Posterior Quadrant ◽  
Localization Performance ◽  
Pure Tones

Twelve blindfolded subjects localized two different pure tones, randomly played by eight sound sources in the horizontal plane. Either subjects could get information supplied by their pinnae (external ear) and their head movements or not. We found that pinnae, as well as head movements, had a marked influence on auditory localization performance with this type of sound. Effects of pinnae and head movements seemed to be additive; the absence of one or the other factor provoked the same loss of localization accuracy and even much the same error pattern. Head movement analysis showed that subjects turn their face towards the emitting sound source, except for sources exactly in the front or exactly in the rear, which are identified by turning the head to both sides. The head movement amplitude increased smoothly as the sound source moved from the anterior to the posterior quadrant.

Target Detection in a Scenario of Natural Sounds: The Role of Spatial Sound Source Separation

2013 ◽  
Author(s):  
Susanne Mayr ◽  
Gunnar Regenbrecht ◽  
Kathrin Lange ◽  
Albertgeorg Lang ◽  
Axel Buchner
Keyword(s):  
Target Detection ◽  
Sound Source ◽  
Source Separation ◽  
Natural Sounds ◽  
Sound Source Separation ◽  
Spatial Sound

It's only real if you see it: Surround system based 3D sound source modelling in virtual reality

2013 ◽  
Author(s):  
Agoston Torok ◽  
Daniel Mestre ◽  
Ferenc Honbolygo ◽  
Pierre Mallet ◽  
Jean-Marie Pergandi ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Sound Source ◽  
3D Sound
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