本文關(guān)鍵詞： 聲場(chǎng) 校準(zhǔn) 影響因素　出處：《聽(tīng)力學(xué)及言語(yǔ)疾病雜志》2016年01期 　論文類型：期刊論文

【摘要】：目的初步探討聲場(chǎng)校準(zhǔn)的周期及其影響因素。方法采用ISO389-7:2005及ISO8253-2:2009標(biāo)準(zhǔn)校準(zhǔn)A、B 2個(gè)聲場(chǎng)(揚(yáng)聲器方位角均為45°),A聲場(chǎng)3個(gè)月校準(zhǔn)一次,B聲場(chǎng)每次使用前校準(zhǔn)一次,分別記錄各聲場(chǎng)左右兩個(gè)揚(yáng)聲器在250、500、1 000、2 000、3 000、4 000 Hz 6個(gè)頻率的聲強(qiáng),并與每個(gè)頻率規(guī)定的標(biāo)準(zhǔn)值(ISO8253-2:2009標(biāo)準(zhǔn):該6個(gè)頻率聲強(qiáng)級(jí)分別為80、80、79、74.5、72、70.5dB SPL)比較;同時(shí)采用多因素方差分析,分析B聲場(chǎng)每次校準(zhǔn)時(shí)周?chē)h(huán)境的溫度、濕度對(duì)聲場(chǎng)的影響。結(jié)果A聲場(chǎng)校準(zhǔn)時(shí)右側(cè)揚(yáng)聲器250、3 000、4 000Hz測(cè)得的聲強(qiáng)級(jí)分別為83.5±2.2、77.0±3.0、76.2±2.7dB SPL,均高于標(biāo)準(zhǔn)值(分別為t=3.15,P0.05;t=3.19,P0.05;t=4.19,P0.05);右側(cè)揚(yáng)聲器其余3個(gè)頻率和左側(cè)揚(yáng)聲器各頻率測(cè)得的聲強(qiáng)與標(biāo)準(zhǔn)值間差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)。B聲場(chǎng)校準(zhǔn)時(shí)右側(cè)揚(yáng)聲器4 000Hz測(cè)得的聲強(qiáng)級(jí)為71.1±1.5dB SPL,與標(biāo)準(zhǔn)值的差異有統(tǒng)計(jì)學(xué)意義(t=2.12,P0.05);而右側(cè)揚(yáng)聲器其余5個(gè)頻率及左側(cè)揚(yáng)聲器所有頻率與標(biāo)準(zhǔn)值的差異均無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)。對(duì)B聲場(chǎng)中與標(biāo)準(zhǔn)值有顯著性差異的右側(cè)揚(yáng)聲器4 000 Hz測(cè)得的聲強(qiáng)與測(cè)試時(shí)聲場(chǎng)的溫度、濕度進(jìn)行多因素方差分析顯示,測(cè)試時(shí)溫度(F=0.9,P0.05)、濕度(F=0.8,P0.05)環(huán)境因素變化對(duì)揚(yáng)聲器聲強(qiáng)級(jí)變化無(wú)顯著影響。結(jié)論對(duì)于頻繁使用的聲場(chǎng),應(yīng)在每次使用前進(jìn)行校準(zhǔn);聲場(chǎng)的溫度、濕度對(duì)聲場(chǎng)校準(zhǔn)無(wú)影響。
[Abstract]:Objective to investigate the period of sound field calibration and its influencing factors. Methods A was calibrated by ISO389-7:2005 and ISO8253-2:2009 standard. B 2 sound fields (the loudspeaker azimuth is 45 擄/ A) sound field is calibrated once every 3 months before each use of B sound field, and each sound field is recorded at 250,500. Sound intensity of 1 000 ~ 2 000 ~ 3 000 ~ 4 000 Hz 6 frequencies. According to the standard value of each frequency, ISO 8253-2: 2009, the sound intensity levels of the six frequencies are 80 / 80 / 79 / 74.572, respectively. 70.5 dB SPLA comparison; At the same time, the influence of ambient temperature and humidity on sound field was analyzed by multifactor analysis of variance. Results the right loudspeaker was 2503 000 in A sound field calibration. The sound intensity levels measured at 4 000 Hz were 83.5 鹵2.2 鹵77.0 鹵3.0 鹵76.2 鹵2.7 dB respectively, which were higher than the standard values (t = 3.15, respectively). P0.05; T (3. 19) (P0.05); Tet 4.19 (P0.05); There was no significant difference between the sound intensity measured from the other three frequencies of the right speaker and the left speaker and the standard value (P0.05). The sound intensity level measured by the right loudspeaker at 4 000 Hz is 71.1 鹵1.5 dB SPL when the sound field is calibrated. The difference between the standard value and the standard value was statistically significant. There was no significant difference between the other five frequencies of the right loudspeaker and the left loudspeaker between all the frequencies and the standard value (P0.05). The sound intensity measured by the right loudspeaker at 4 000 Hz and the temperature of the sound field measured in B sound field were significantly different from the standard value. The multivariate variance analysis of humidity showed that the temperature was 0.9g P0.05g and the humidity was 0.8. P0.05) the change of environmental factors has no significant effect on the sound intensity of loudspeaker. Conclusion for the frequently used sound field, calibration should be carried out before each use. The temperature and humidity of sound field have no effect on sound field calibration.
【作者單位】： 中國(guó)聾兒康復(fù)研究中心;
【分類號(hào)】：R764
【正文快照】： hearing impaired patients clinically should be calibrated periodically.The tested factors such as temperatme and ju-midityhave no influence on the sound field.用于聲場(chǎng)測(cè)聽(tīng)的準(zhǔn)自由聲場(chǎng)建立后需定期進(jìn)行校準(zhǔn),與聲場(chǎng)校準(zhǔn)相關(guān)的國(guó)際標(biāo)準(zhǔn)分別為ISO389-7和ISO8253-2[，

本文編號(hào)：1466055