A variety of approaches are used to determine the sound absorption coefficients of substances. Sound absorption coefficients are frequently measured and estimated using expensive equipment. To compute sound absorption ratios of leaves from several tree species, researchers used an impedance tube, function generator, conventional audio amplifier, omnidirectional microphone, and oscilloscope. A sound absorption ratio was created in a closed system to analyse sound absorption on a relative scale. Sabine's formula was used to calculate the sound absorption ratio, which was then calculated. When the sound absorption ratio approaches one, the sound absorption capacity is inadequate. For various frequencies, the sound absorption ratio of different tree species' leaves was examined. An oscilloscope was used in conjunction with a long impedance tube and a speaker to conduct the experiments. When building the tube, a frequency range of 500Hz–1000Hz was chosen as the working frequency for reverberation and sound absorption tests. Several plant species' leaves showed variable levels of absorption at different frequencies. Barringtonia acutangula Goerb, Eucalyptus globulus Labill, Ficus benghalensis L, Ficus glomerata Roxb, Ficus religiosa L, Mangifera indica L, Polyatlhia longifolia Thev, Sterculia urens L, and Thespesia populnea Soland were shown to have strong sound absorption in their leaves The method for measuring sound absorption of foliar surfaces is relatively affordable and simple to utilise.
Author (S) Details
Payal Rane – Acharekar
Department
of Botany, Jaihind College, Mumbai, India.
Ambika Joshi
Department
of Botany, Jaihind College, Mumbai, India.
Nitesh Joshi
Department
of Botany, Rizvi College of Arts, Science and Commerce, Mumbai, India.
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