CAJ | 학술논문

在居家生活中，抽油烟机之噪声甚为扰人而影响生活质量。就现有某型常用抽油烟机，利用声级计量测其噪声量与频谱，并利用人工耳及 dB sonic 软件分别量测分析其声音质量参数值，所得结果在人耳位置之声级为68.1 dB(A)，音质粗糙度为33.5 asper，响度为27.8 sone，波动强度为6.8 vacil，尖锐度为1.64 acum，并按王氏之烦躁度模式评估出烦躁度指针为13.19，其中以响度及尖锐度对音质评估之烦躁度指标影响最大。经机壳与机座之振动量测频谱与噪声频谱比较，鉴定出噪声主要峰值频率为500 Hz与100 Hz两个成分音，其中500Hz者为进气口之涡流噪声；而100 Hz者为机壳之振动辐射声。为降低排油烟机之响度及尖锐度以改善其运转时之声音质量，采用了几项对策。分别是：在进气口加装消声器，在机壳内侧贴吸声棉及包覆PU塑料膜，并黏贴阻尼材，所得效果可使噪声量降为55.2 dB(A)，振动量减1~5 dB，响度降为14.7 sone，尖锐度降为1.35 acum，烦躁度指标降为8.16。
재거가생활중，추유연궤지조성심위우인이영향생활질량。취현유모형상용추유연궤，이용성급계량측기조성량여빈보，병이용인공이급 dB sonic 연건분별량측분석기성음질량삼수치，소득결과재인이위치지성급위68.1 dB(A)，음질조조도위33.5 asper，향도위27.8 sone，파동강도위6.8 vacil，첨예도위1.64 acum，병안왕씨지번조도모식평고출번조도지침위13.19，기중이향도급첨예도대음질평고지번조도지표영향최대。경궤각여궤좌지진동량측빈보여조성빈보비교，감정출조성주요봉치빈솔위500 Hz여100 Hz량개성분음，기중500Hz자위진기구지와류조성；이100 Hz자위궤각지진동복사성。위강저배유연궤지향도급첨예도이개선기운전시지성음질량，채용료궤항대책。분별시：재진기구가장소성기，재궤각내측첩흡성면급포복PU소료막，병점첩조니재，소득효과가사조성량강위55.2 dB(A)，진동량감1~5 dB，향도강위14.7 sone，첨예도강위1.35 acum，번조도지표강위8.16。
In everyday life, the noise generated by exhauster in kitchens can be very annoying and therefore could affect life quality. In this article, the noise level spectrum and sound quality parameters for a specific exhauster are measured and analyzed by the sound level meter, the head/torso simulator and the software dB-sonic respectively. The results show that, at the position of human ears, the SPL is 68.1 dB(A), the roughness is 33.5 asper, the loudness is 27.8 sone, the fluctuation intensity is 6.8 vacil, the sharpness is 1.64 acum and the annoyance index based on the Wang’s model of sound quality (SQ) assessment is 13.19, of which the sharpness and the loudness affects the SQ of the exhauster to the largest extent. By measuring vibrations on the exhauster casing and the motor seat, and comparing the vibrational spectra with that of the radiated vibroacoustic noise spectrum, it has been identified that the major peak components of the noise occur at the frequencies of 500Hz and 100Hz. The 500Hz sound component comes from the flow vortex at the intake, while the 100Hz sound component is induced by the casing vibrations. In order to improve the SQ of the ex-hauster, five countermeasures are adopted in this study to reduce both the sharpness and the loudness, namely:the in-stallation of a muffler at the intake end;the installation of some absorption glasswool on the inside surface of the casing and the coverage of the glasswool with a thin PU film;the adhesion of damping tape on the casing surface and ventila-tion pipewall;and the combination of the above four measures. As a result, the noise level is reduced to 55.2 dB(A), the vibrations is reduced by1~5 dB, the loudness reduces to 14.7 sone, the sharpness reduces to 1.35 acum and the an-noyance index reduces to 8.16.