The objective of this research is to compare the sound absorption of sound control sheet from วัสดุธรรมชาติ 4 crops are coconut, rice straw,. Core corn and leaves, mixed with cement in 1: 6 ratio, and 2: 6 3: 6 frequency 1 000 Hz,,,,, 2 000 Hz 3000 Hz 4 000 Hz, and found that the ratio of 1: 6 straw can absorb noise as much as possible. 47.23 percent frequency 1 000,, Hz ratio. 2: 6 corn core can absorb the sound as much as possible. 47.39 percent frequency 2 000 Hz ratio, and 3:6 core corn can sound absorption as possible.) 48.39 at every frequency.
การแปล กรุณารอสักครู่..
