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Room Acoustics
Published in Dhanesh N. Manik, Vibro-Acoustics, 2017
The interaction of sound with the surfaces of an enclosed space comes under the purview of room acoustics. Room acoustics in earlier times was also called architectural acoustics and building acoustics, when the science and engineering of pleasant sound was the main objective. That was the time in which interest in machine-generated noise was not very important. Reducing sound from noisy machinery inside an enclosed space is much different from modifying an enclosed space to obtain pleasant sound. I would prefer to use room acoustics with respect to machinery noise and architectural acoustics for producing the right note in an auditorium. The most important approach to changing room acoustics is the use of sound-absorbing materials, which is the subject of this chapter.
Wood and Wood-Based Materials in Architectural Acoustics
Published in Voichita Bucur, Acoustics of Wood, 2017
Two points are relevant to the fundamental aspects of room acoustics: the generation and propagation of the sound in an enclosure and the physiological and psychological factors that provide clues about the good or poor acoustics of concert halls, opera houses, lecture rooms, churches, restaurants, offices, and the like. The first aspect is related to the physical phenomenon of wave propagation and sound field description. The second aspect is related to a subjective perception of sound by the listener(s).
Room Acoustic Measures
Published in Eddy B. Brixen, Audio Metering, 2020
Room acoustic measures provide information about how sound behaves inside a room, how the sound is distributed, and about the influence of size, shape, surface materials, and so on. Many of the measures are related to the way we perceive and assess the sound as listeners, as performers in the room, or as recording- or SR-engineers. In this chapter, some basic room acoustic parameters and the related measures are briefly described.
Prediction of noise levels in large shopping streets covered by glass and ETFE
Published in Architectural Engineering and Design Management, 2021
Monika Rychtáriková, Richard Šimek, Jarmila Húsenicová, Vojtech Chmelík
Preliminary case studies of large atria covered by ETFE foil structure have shown a rather positive impact on acoustic conditions in- and outdoors (Rizzo & Zazzini, 2016; Szabó, Šujanová, Glorieux, & Rychtáriková, 2018; Urban, Zrneková, Zaťko, Maywald, & Rychtáriková, 2016; Urbán, Zelem, Maywald, Glorieux, & Rychtáriková, 2017). Concerning room acoustics, it is well known that the influence of sound absorptive properties of building interior surfaces on noise is most prominent in small rooms, where the density of sound reflections is high (Polomová, Vargová, Chmelík, & Urban, 2014; Rychtáriková, Chmelík, Urbán, & Vargová, 2016). In this paper, we, therefore, focus on the analysis of acoustic conditions in relatively wide shopping streets where the impact of glass and ETFE foil systems have not been investigated yet in detail. The parametric study shows the influence of roofing material in combination with varying height and width of the shopping street with the same length of 100 m.
Room Response Equalization of Non-Minimum Phase Systems Using Kautz Filter and Sparse Autoencoder: A Hybrid Approach
Published in IETE Journal of Research, 2022
Sayanti Chaudhuri, Debangshu Dey, Sugata Munshi
Room acoustics deals with the creation, propagation, and perception of sound inside closed spaces. These spaces may be auditoria, lecture rooms, concert halls, etc. Important signatures of the acoustical property of a room, and in fact of any enclosure in general, are the room impulse responses (RIR) [1]. The RIRs provide a vivid representation of the acoustic behaviour between the two points: the source and the receiver within the room. Thus, different receiver and source positions will lead to different RIRs for the same room. It is predominant that while reproducing sound in a closed room, reflections and reverberations often arise by mutilating the sound produced by an acoustic source, thus affecting listening and attention. In this regard, the concept of room response equalization (RRE) has come into being. RRE deals with improving the sound quality produced in real environments such as cinema theatres, home theatres, car hi-fi systems [1,2]. RRE is also essential in implementing hearing aid applications [3]. It is often seen that the hearing aid users suffer several problems such as unwanted noise and acoustic reverberation which eventually decrease intelligibility and acoustic comfort. There are many papers [4–6] that portray the noise reduction and speech dereverberation algorithms in context to the hearing-aid implementation. But, apart from the intelligibility and comfort issues, room response equalization is essential for sustaining the original acoustic scenario to the hearing-aid users. Efforts have been made by researchers over decades to enhance the listening experience under reverberant conditions. A plethora of design techniques have been proposed for RRE.
Textiles in architectural acoustic conditioning: a review
Published in The Journal of The Textile Institute, 2022
M. Pilar Segura Alcaraz, Marilés Bonet-Aracil, Ernesto Julià Sanchís, Jorge G. Segura Alcaraz, Ignacio Montava Seguí
Sound is a spherical pressure wave. It can be transmitted, reflected or absorbed to a greater or lesser percentage, and arrives to the receiver from various directions, forming the diffuse sound field. Room acoustics enables to achieve acoustic comfort by means of actions on the structures forming rooms like walls, ceiling and floor. In Figure 1 functions of room acoustics are shown.