Judul: Analysis of noise on black tea processing in milling, drying, and sorting room of PTPN VIII Gunung Mas Plantation, Cisarua, West Java
Abstrak: Tea plant is a green leafy plants commonly cultivated in high mountain regions. Black tea was made through fermentation, and furthermore black tea was divided into two types, they are orthodox tea and CTC tea (Crushing, Tearing, and Curling). The processing of CTC tea at PTPN VIII Gunung Mas Plantation include acceptance of raw material, disclosure of tea leaves, withering, milling and fermentation, drying, sorting and packaging. PTPN VIII Gunung Mas Plantation running the production activity by using the machines in large scale. The use of machinery on a large scale resulted in positive impact and negative impact for worker and company. One of the negative impacts suffered by workers is noise impact. Noise can be defined as undesirable sound, annoying sound, or irritating sound that in the long run will be able to disrupt the comfort when working. Noise that exceeds the threshold value will cause a reduction in auditory function, and if it goes on will cause deafness in factory workers. This can lead to decrease in concentration of work. The purpose of measuring noise in the factory is to analyze the areas that produce high noise so that the factory worker can work in the factory according to a predetermined safe time, this is to reduce the negative effects of noise. High frequency noise can be found in milling room, drying room and sorting room. The pattern of noise spread on every shift are not equal, it is because the number of machines that operating in shift 1 and shift 2 was different, so that the noise value in shift 1 was higher than shift 2. The noise value in milling room, drying room and sorting room exceeds the threshold value. Therefore, the safe time for being in that rooms were average below 8 working hours/day. To prevent damage to auditory, worker advised to use ear protection device to protect their auditory during work.
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Judul: Analisis Kebisingan dan Dampak Lingkungan pada Proses Penggilingan Padi (Studi Kasus Penggilingan Padi Saluyu Situ Gede, Bogor Barat)
Abstrak: Rice mill process is one of the factors to increase the rice quality. Indonesia is one of the big rice producers in the world, it couldn't be imagined the noise if every single village has the rice mill enterprise. The purpose of this research is to analyse level and noise dissemination pattern in the rice mill, analyze maximum duration in the room based on noise threshold based on labor standard, analyze and measure noise in the surrounding of the rice mill area, as well as control the noise and analyze employee hearing deterioration. Data is collected by doing direct measurement in the field and interview towards 2 respondents. The result obtained is the highest noise in the place that is often passed by rice mill employee in the area near the diesel machine sized 105 dB, in the husker operation area sized 90 dB and in the polisher operation area sized 92 dB. Maximum time limit of being near to the diesel machine is safe and continued based on DEPNAKER RI standard with a noise level of 105 dB is 30 minutes, in husker operation area with a noise level of 90 dB is 4 hours and in polisher operation area with a noise level of 92 dB is 3 hours. Noise measurement result in a resident's house terrace is 65 dB and the noise level in PAUD class room is 58 dB. Technical design for the noise control by using barrier as a sound-damper building is designed for the resident's house and PAUD because the noise passes standard level of the allowed noise. For barrier design that has been made 180 cm high, noise reduction has estimated for 22%. Audiometric test result for 2 employees that work on rice mill is, for the respondent 1 with 45 years old has right ear got a medium deaf and the left ear got serious deaf and respondent 2 with 38 years old has both ears got minor deaf.
Keyword: audiometrict test, environmental noise, room noise, ricemill

Judul: Embriogenesis ikan buta (Astyanax fasciatus)
Abstrak: Ikan buta Astyanax fasciatus adalah spesies ikan unik dari famili Characidae yang menempati perairan dalam gua di Wilayah La Cueva Chica-San Luis Potasi-Mexico. Ikan ini memiliki mata yang tereduksi (Blind Cavefish) dan warna kulit merah muda, pucat serta mengkilap.
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