No abstract

This study aims to determine the level of sound attenuation of Styrofoam material. This research is using a noise meter application Decibel X: dB Sound Level Meter and a sound generator as a sound source. Styrofoam as an acoustic material with a thickness of 1 cm; 1.5 cm; 2 cm; 2.5 cm ; 3 cm; 3.5 cm and 4 cm. The average absorption coefficient obtained in this study with a material thickness of 1 cm is 0.023. Then the average absorption coefficient at a thickness of 1.5 cm is 0.031. While the average absorption coefficient at a material thickness of 2 cm is 0.040. Furthermore, the average sound absorption coefficient at a thickness of 2.5 cm and 3 cm has the same value, namely 0.039. Then, the average sound absorption coefficient at a thickness of 3.5 cm and 4 cm also has the same value, which is 0.038. Based on the research that has been done, it can be concluded that sound absorption at frequencies below 1000 Hz occurs significant sound absorption. At frequencies of 200 Hz, 400 Hz, 600 Hz and 800 Hz, the average sound absorption increases from 1 cm to 3.5 cm of Styrofoam thickness. While the thickness of Styrofoam 4 cm on average did not show a significant increase in sound absorption. Styrofoam thickness of 4 cm can effectively absorb sound at a frequency of 1000 Hz only.

Global warming causes the earth's temperature to increase, making humans reduce outdoor activities and spend a lot of time indoors. Temperature that is too hot or cold cause discomfort to the users of the room. Based on the description of the problem, the researcher will analyze the thermal comfort of the room. The method used in this research is a survey using the Hygrometer Thermometer HTC-2 to obtain data on indoor and outdoor temperature and humidity at certain times. This study took data using the Hygrometer Thermometer HTC-2 four times in one day. The results showed that room temperature comfort was obtained at a temperature range of 27 °C to 29 °C. Then the comfort level is based on the highest time at 06.00 - 09.00 WIB with an average temperature at that time of 27.75 °C.