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![Examples of cymatic patterns [8].](profile/H-Hossam-Eldien/publication/236663244/figure/fig1/AS:299295342383106@1448368978640/Examples-of-cymatic-patterns-8.png)
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![FIGURE 1 . Examples of cymatic patterns [8].](profile/H-Hossam-Eldien/publication/236663244/figure/fig1/AS:299295342383106@1448368978640/Examples-of-cymatic-patterns-8_Q320.jpg)
Acoustic diffusers are important components in enhancing the quality of room acoustics. This paper investigates a new type of 2D diffusers obtained by the Cymatics phenomena. Cymatics is the study of sound and vibration made visible, typically on the surface of a plate, diaphragm, or membrane. Four shapes of the diffusers were designed by the Cymat...
Contexts in source publication
Context 1
... waves were considered as invisible phenomena until scientists proved that the effects of sound waves can be seen by cymatics (Figure 1). The objective of their experiments in this field was to make sound waves observable by the human eye, since our sense of sight is the most discriminating. ...
Context 2
... order to investigate the efficiency of the designed diffusers, the diffusivity of the diffusers was tested and compared with the diffusivity of the flat panel. Following, echo criterion (EC) was used to compare the acoustic behaviour of the four diffusers ( Figure 10). ...
Context 3
... can be found that, at low frequencies, the high reflection is obvious, especially when using the flat panel (see Figure 11(a). The sound energy then started to distribute in a more even way at the usable frequency range (400- 4000 Hz), and tends to be more like a semicircle as it gets closer to the design frequency (830 Hz) through the use of diffusers. ...
Context 4
... value of EC should not exceed 1.8 for music and 1.0 for speech (Table 3). (Kuttruff, 2009) By comparing the results of EC music and EC speech in Figures 12 and 13 respectively, it can be seen that both values remain stable when using the diffusers, whilst they increase steeply and peak at the 90° angle when using the flat panel. In addition, the value of EC speech starts from 1.5 for the flat panel, which is considered above the recommended value for speech. ...
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Citations
... This does not mean that we cannot design one worship space for different groups, but rather could mean creating a flexible design that allows for modifying the acoustics according to the required activity. An example of flexable acoustic architectural elements is the cymatic diffusers that can provide a variety of visual and acoustical design solutions by rearranging the diffusers [24] as shown in Figure 3. This leads to another important point, which is the relationship between the visuals and auditory sensations, and how they affect the perception of space. ...
Physical measurements of architectural acoustics do not precisely reflect the human acoustical experience in worship spaces. While many studies focus on architectural acoustics, aural architectural analysis that includes perceptual and cultural aspects, in addition to the physical aspects, and provides more comprehensive understanding of the aural experience, is afforded less attention. Worship spaces require complicated acoustical environments that allow both the hearing of sound clearly and the experiencing of sound aesthetics. This experience can create emotional effects through the perception of sound; therefore, there is the need for further study on the relationship between the qualitative and quantitative acoustical characteristics of religious buildings. This review paper provides a comparative analysis of previous studies in terms of physical, perceptual and cultural aspects of acoustics, and further clarifies the research gap in this area. Finally, it recommends strategies for studying the aural experience in worship spaces through the interaction between the cultural influence that affects how a specific sound is perceived, and the architectural elements that change acoustical parameters, thus playing an important role in the perception of the sound in the space.
