作为酒吧音响回收http://www.ysyx001.com/过程中的重要环节，音箱对酒吧整体的音效起着至关重要的作用。酒吧音箱的各项技术指标中，有五项非常重要，分别是灵敏度、频率响应、指向特性、输出阻抗和动态范围。As an important part of the bar audio recycling process, the speaker plays an important role in the overall sound of the bar. There are five important technical indicators of the bar speakers, namely, sensitivity, frequency response, pointing characteristics, output impedance and dynamic range.
1.灵敏度。酒吧音响回收专家认为，灵敏度是表示传声器声电转换效率的重要指标。它的定义为：在自由声场中，传声器频率为1KHz恒定声压下与声源正向(即声入射角为零)时所测得的开路输出电压。Sensitivity. Bar audio recycling experts believe that the sensitivity of the microphone is an important indicator of the conversion efficiency of sound and electricity. It is defined as: in the free sound field, the open circuit output voltage is measured at a constant frequency of 1KHz and the sound source forward (i.e., the sound incidence angle is zero).
2.频率响应。它是反映话筒电转换过程中对频率失真的一个重要指标。传声器在恒定声压和规定入射角声波作用下，各频率声波信号的开路输出电压与规定频率传声器开路输出电压之比，称为传声器的频率响应，用分贝(db)表示。酒吧音响回收专家提醒，一般专业用话筒频响曲线容差范围在2db。Frequency response. It is an important index to reflect the frequency distortion of the microphone. The microphone in the constant pressure and incident angle of acoustic provisions under the effect of the frequency of sound wave signal with specific frequency microphone open circuit output voltage open circuit output voltage ratio, the frequency response of the microphone said, DB (DB) said. Bar audio recycling experts to remind the general professional microphone frequency response curve tolerance range in 2db.
3.指向特性。酒吧音响回收专家介绍，传声器灵敏度随声波入射方向的变化而变化的特性称为指向性。常用指向图来表示。Pointing characteristics. Bar audio recycling experts, the sensitivity of the microphone along with the direction of the change in the direction of the incident wave is called directivity. Commonly used to indicate.
4.输出阻抗。酒吧音响回收专家认为，指传声器交流内阻，用频率1KHz，声压为1Pa时测得。常分为低阻抗，高阻抗。一般1K以下为低阻抗，大于1K以上为高阻抗。高阻抗传声器灵敏度有所提高，但容易感应交流声等外来干扰，电缆不宜长。Output impedance. Bar audio recycling experts believe that the microphone AC internal resistance, with a frequency of 1KHz, the sound pressure of 1Pa. Usually divided into low impedance, high impedance. Generally below 1K for low impedance, greater than 1K for high impedance. The sensitivity of the high impedance microphone is improved, but it is easy to induce the external interference such as AC noise.
5.动态范围。是指传声器输出最小有用信号和最大不失真信号之间电频差。动态范围小，会引起声音失真，音质变坏，因此要求有足够大的动态范围。Dynamic range. Refers to the difference between the output signal of the microphone and the maximum distortion signal. The dynamic range is small, can cause the distortion of the sound, the sound quality is bad, therefore requests to have the enough big dynamic range.
酒吧音响回收专家认为，由于传声器是用在传递人声保真度，用在音响设备的最前端的重要设备，音质的好坏取决于传声器的正规产家、名牌、正确选用，有很大关系。Sound bar recovery experts believe that the microphone is used in the transmission of voice fidelity, the front of the important equipment used in audio equipment, sound quality is good or bad depends on the normal microphone production, famous brand, the correct selection of a great relationship.
