论文部分内容阅读
音箱的灵敏度是一个非常重要的指标,音箱的灵敏度:是指给音箱馈入1 W的音频电信号,在音箱中心轴线1 m处声音的声压,用(dB)表示。假如距离增加十倍,则声压就衰减20 dB。如果在其他条件相同的情况下,一只90 dB的音箱只需要10 W的驱动功率就能达到满意的声压,而一只87 dB的音箱却需要20 W的驱动功率才能达到。音箱的灵敏度虽然只相差3 dB,而功率放大器的输出功率却要成倍增加。说明音箱的灵敏度高,所需要的驱动功率就小,音箱的灵敏度低,
Sensitivity of the speaker is a very important indicator of the sensitivity of the speaker: refers to the speaker fed 1 W audio and electrical signals, the central axis of the speaker at 1 m sound pressure, expressed in (dB). If the distance increases tenfold, the sound pressure decays by 20 dB. If, under the same conditions, a 90 dB speaker requires only 10 W of drive power to achieve a satisfactory sound pressure, an 87 dB speaker requires 20 W of drive power. Although the sensitivity of the speaker only a difference of 3 dB, but the power amplifier output power has doubled. Description of the speaker high sensitivity, the required drive power is small, the speaker’s sensitivity is low,