| Summary: | 碩士 === 國立屏東科技大學 === 木材科學與設計系所 === 98 === The ISO architectural acoustics measurement and evaluation criteria have become more universal international standard in recent years, we modified Chinese National Standards (CNS) with international trend in Taiwan. In Taiwan, we have two standards of the floor impact sound of field measurement. In this study, our object is residential floor to measure the performance of floor impact sound insulation and compare the two CNS standards in Taiwan. On the other hand, we referred to effect of impact sound on raised wooden floor are placed by vibration- resistant and sound absorbing materials. The results showed that the impact sound pressure level in CNS 8464 and CNS 15160-7 measuring methods was insignificantly. After we amend the equivalent sound absorption area or response time, impact sound pressure level L was differs L'n and L'nT more than 6 dB in each frequency. The floor total thickness of 160 mm to 215 mm, floor impact sound insulation performance was insignificant, the single-number quantity only difference 1 ~ 2 dB; however, we fitting the ceiling and raised wooden floor could improvement floor impact sound. We decorating ceiling with 200 mm air layer, the single –number quantity could be reduced 11 dB. With the height increasing of the raised wooden floor, the single-number quantity could reduce the 3 ~ 8 dB. Comparison did not put up the vibration- resistant pad and put vibration- resistant pad, each frequency could reduce more than 2 dB. Into the glass fiber could improve the frequency of 160 Hz ~ 400 Hz of the floor impact sound reduced more than 5 dB.
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