Measurement of Sound Pressure Level and Noise Flow of a Split-Type Air-Conditioner Outdoor Unit

Abstract

The study was conducted in accordance with ISO 3741-2 and Department of Environment standards, using a TES-1353-H sound level meter. Three modes of operation were studied: fan, cool, and turbo. The unit was tested at different operating conditions, including fan speeds, temperature settings, and outdoor temperatures. The sound pressure level was measured around the unit, including the front, back, and sides. The study results showed that the noise level generated by the unit in the cool mode met the standards the Department of Environment set, with an average sound pressure level of 61.31 dB. However, the noise level generated by the unit in the turbo mode exceeded the maximum limit of 68 dB, with an average sound pressure level of 69.41 dB. The noise level generated by the unit in the fan mode also exceeded the maximum limit of 68 dB, with an average sound pressure level of 71.16 dB. The findings of this research can be used to improve the design and operation of outdoor units to reduce noise pollution and improve overall customer satisfaction. The study suggests that the noise level generated by the unit in the cool mode is within the acceptable range and that the unit can be operated in this mode without causing a disturbance to the surrounding environment. However, the unit should not be operated in the turbo or fan modes, as the noise levels generated in these modes exceed the maximum limit the Department of Environment sets.