發(fā)布時間：2018-01-26 16:17

  本文關(guān)鍵詞： 聲場 校準 影響因素　出處：《聽力學及言語疾病雜志》2016年01期 　論文類型：期刊論文

【摘要】：目的初步探討聲場校準的周期及其影響因素。方法采用ISO389-7:2005及ISO8253-2:2009標準校準A、B 2個聲場(揚聲器方位角均為45°),A聲場3個月校準一次,B聲場每次使用前校準一次,分別記錄各聲場左右兩個揚聲器在250、500、1 000、2 000、3 000、4 000 Hz 6個頻率的聲強,并與每個頻率規(guī)定的標準值(ISO8253-2:2009標準:該6個頻率聲強級分別為80、80、79、74.5、72、70.5dB SPL)比較;同時采用多因素方差分析,分析B聲場每次校準時周圍環(huán)境的溫度、濕度對聲場的影響。結(jié)果A聲場校準時右側(cè)揚聲器250、3 000、4 000Hz測得的聲強級分別為83.5±2.2、77.0±3.0、76.2±2.7dB SPL,均高于標準值(分別為t=3.15,P0.05;t=3.19,P0.05;t=4.19,P0.05);右側(cè)揚聲器其余3個頻率和左側(cè)揚聲器各頻率測得的聲強與標準值間差異無統(tǒng)計學意義(P0.05)。B聲場校準時右側(cè)揚聲器4 000Hz測得的聲強級為71.1±1.5dB SPL,與標準值的差異有統(tǒng)計學意義(t=2.12,P0.05);而右側(cè)揚聲器其余5個頻率及左側(cè)揚聲器所有頻率與標準值的差異均無統(tǒng)計學意義(P0.05)。對B聲場中與標準值有顯著性差異的右側(cè)揚聲器4 000 Hz測得的聲強與測試時聲場的溫度、濕度進行多因素方差分析顯示,測試時溫度(F=0.9,P0.05)、濕度(F=0.8,P0.05)環(huán)境因素變化對揚聲器聲強級變化無顯著影響。結(jié)論對于頻繁使用的聲場,應(yīng)在每次使用前進行校準;聲場的溫度、濕度對聲場校準無影響。
[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】： 中國聾兒康復研究中心;
【分類號】：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.用于聲場測聽的準自由聲場建立后需定期進行校準,與聲場校準相關(guān)的國際標準分別為ISO389-7和ISO8253-2[，

本文編號：1466055