Vibro-Acoustical Analysis of Chakra Bowls

Soon, Jeremiah Li (2023) Vibro-Acoustical Analysis of Chakra Bowls. Final Year Project (Bachelor), Tunku Abdul Rahman University of Management and Technology.

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Abstract

Around the globe, sound has been traditionally used therapeutically for thousands of years. In addition to being employed in musical therapy and relaxation methods today, singing bowls were once used in religious rites and meditation. Balancing the seven primary chakra points on the human body is crucial for overall health. Although yoga and meditation are useful practices, chakra balancing through sound therapy with the seven chakra singing bowls can be effective. The bowls generate particular frequencies and musical notes that correlate to the seven chakra sites in the body by rimming or striking them. especially for those who experience stress and poor sleep, singing bowl therapy is utilized to promote mental and physical wellness. In this project, the acoustical and vibrational characteristics between various chakra singing bowls were investigated to further comprehend the singing bowls. The different wave patterns on the surface of different chakra singing bowls were observed to understand the mode shapes of the bowls. A mallet and an accelerometer were used in an impact spectrum analysis experiment to evaluate the vibration response of chakra singing bowls and estimate their modal parameters. For each of the seven chakra singing bowls, frequency peaks were measured in the experiment, and the findings were evaluated. The chakra singing bowls are put through sound analysis testing, a microphone was utilized to record the sound that was produced when the bowl was struck or rimmed. LMS Spectral Testing software was used for recording and analysing the time response of the sound and sound spectrum. The outcomes were evaluated for the seven chakra bowls’ sound spectrums and peaks. The sound characteristics of the chakra singing bowls were examined using sound diagnosis in the LMS Spectrum Testing software. The chakra singing bowls were stimulated at their frequencies by a permanent magnetic shaker while a camera recorded the waveform on the water’s surface inside the bowl. To ontrast the seven chakra singing bowls, the wave pattern was examined. Different frequencies were controlled and replicated using RT Pro Software. The seven chakra singing bowls were the subject of an investigation on their acoustical and vibrational properties. Utilising sound testing and impact testing experiments, each bowl was identified for its notes. The bowls’ overtones or ringing effects have been confirmed. Because of its sharper and more defined waveform, the sound produced by striking the bowl lasted longer than that produced by rimming the bowl when the duration response of the sound was recorded. Each bowl has a different sound decay because of its frequency and thickness of its wall. The rate of sound decay increases with frequency while falling off with bowl thickness. Therefore, the bowl’s thickness has a greater impact on how quickly sounds decay. Bowl 5 (96hz) has more sound decay than Bowl 2 (73hz). Bowl 1 is the thickest bowl (1.1 cm thick) and Bowl 6 and bowl 7 (1 cm thick) had the least amount of sound decay. When the surface wave patterns of seven chakra singing bowls were examined, it was discovered that each of the bowls’ physical properties largely maintain the mode shapes. Four, six, and eight edges appeared on the water’s surface in response to the first, second, and third frequency peaks, correspondingly. As a result of their uniformity in size, shape, and material, the seven chakra singing bowls all have these identical mode shapes.