声音自动化测试系统|声学自动化测试设备|声学自动化测试系统|声学自动化测试机器
深圳市中誉达自动化测试设备有限公司是一家专门从事设计生产自动化测试软件的公司，主要业务有：FCT，FVT，单片机测试系统，MCU测试系统，图像识别系统，电阻电容分选机测试系统，边界扫描测试系统，遥控控制测试系统，TV电视测试系统，电源测试系统以及MIC测试系统，扬声器测试系统，RF测试系统，音频测试系统及数字音频测试系统，FPC软板测试，图像方面的CVBS，SVIDEO，RGB的测试，ITU656的测试，HDMI信号的测试，电压电流的测试，USB，串口，GPIB接口的仪器通信，I2C协议/SPI协议的元器件控制，洗衣机测度，冰箱测试，烤箱测试，微波炉测试，空调测试，手机测试，电源测试，DVD测试，MP3测试，音箱测试，功放测试，医疗器械测试声，LED节能灯测试，UPS的测试，汽车收音机测试，车载显示器测试，电子书测试，电话机测试，闪光灯寿命测试......
为了测试声音的频率,失真度,信噪比，噪声，声音的振幅，频响....深圳市中誉达自动化测试设备有限公司专门设计了一套完善的测试方案（关于声音测试的系统），覆盖的产品包括一切有声音的产品有：电话机，DVD，VCD，CD，功放，音响，手机，电视机.....
1）频率：物理中频率的单位是赫兹（Hz），简称赫，也常用千赫（kHz）或兆赫（MHz）或GHz做单位，单位符号为f。1kHz=1000Hz，1MHz=1000000Hz 1GHz=1000MHz。频率f是周期T的倒数，即f =1/T，波速=波长*频率。而像中国使用的电是一种正弦交流电，其频率是50Hz,也就是它速度惊人的地方，一秒钟内做了50次周期性变化。 测试信号的周期是否正常，保证声音在人耳的听觉范围之内。（采用仪信器/板卡/电路可选）
2）失真度：音箱的失真度定义与放大器的失真度基本相同，不同的是放大器输入的是电信号，输出的还是电信号，而音箱输入的是电信号，输出的则是声波信号。所以音箱的失真度是指电声信号转换的失真。声波的失真允许范围是10%内，一般人耳对5%以内的失真不敏感。测试失真度一般不要大于%5，因为大于%5人耳比较容易听出来。我们测试失真度从而保证产品的声音人耳听不出声音的失真（采用仪信器/板卡/电路可选）
3）信噪比：信噪比是音箱回放的正常声音信号与无信号时噪声信号(功率)的比值。用dB表示。例如，某音箱的信噪比为80dB，即输出信号功率是噪音功率的10^8倍，输出信号标准差则是噪音标准差的10^4倍。信噪比数值越高，噪音越小。（采用仪信器/板卡/电路可选）
4）噪声：是一类引起人烦躁、或音量过强而危害人体健康的声音.噪声是一种主观评价标准，即一切影响他人的声音均为噪声，无论是音乐或者机械声等等。所以要把噪声控制在一定的范围内，否则会影响电子产品的质量（采用仪信器/板卡/电路可选）
5）声音的振幅：声音的振幅决定声间的大小。可以测试产品输出声音的大小。（采用仪信器/板卡/电路可选）
6)频响：频响范围，全称是频率响应范围，也叫频率特性。频率响应是指在振幅允许的范围内音响系统能够重放的频率范围，以及在此范围内信号的变化量称为频率响应。人类听觉所能达到的范围大约在20Hz-20KHz，目前成熟的耳机工艺都已达到了这种要求。在额定的频率范围内，输出电压幅度的最大值与最小值之比，以分贝数（dB）来表示其不均匀度。普通功放的频率响应为20Hz-20000Hz约(+/-)l-3dB；优质功放的频率响应为20Hz-20kHz 约+/-0.1dB。
本系统采用国际上通用的测试软件labview编写测试程序，用电脑去控制测试卡，和仪器工作完成自动化测试的目的。本测试系统测试速度快，测度稳定！深受用户好评！
English:
Acoustic automated test systems|sounds automated test equipment|sounds automatic test system|sounds automatic test machine
in order to test the frequency,THD
In order to test the sound frequency, distortion, amplitude, signal to noise ratio, noise, frequency response,etc.....Shenzhen zyate technology Co. Ltd specialized designed a whole test proposal for the sounds test systems，includes test products as following:telephone，DVD，VCD，CD，sounds power amplifier，television,bluetooth headphone etc.....
1）frequency：Physics unit of frequency is Hertz（Hz），Also usually used in kilohertz (kHz) or megahertz (MHz) or GHz do unit，Unit symbol was f. 1kHz=1000Hz，1MHz=1000000Hz 1GHz=1000MHz. f=1/T，Wave speed = wavelength * frequency.The test signal cycle is normal? Ensure the sound in the range of human hearing.（test tools:The instrument/circuit board was optional）
2）Distortion：the speaker distortion is the same definition as the amplifier distortion，the difference was the amplifier input is the electronic signal，the outputs was still the electronic signal.the sound box inputs was the electronic signal but the outputs was the sounds wave signal.so the sound box distortion was the electric transform to sound signal distortion,The sound distortion range was 10%，Most people's ears are not sensitive to less than 5% distortion,distortion must be less than 5%，because people easy to hear if more than 5%.we are check the we check the sound distortion of the products is ensure the ears can't hear the sound distortion.（Equipment/electronic circuit option）
3）Signal-to-noise：SNR is the ratio of the normal speaker playback sound signals with no signal noise signal (power).Expressed in "dB" symbol。for example,there was a sound box and the SNR is 80dB,the output signal power is 10 ^ 8 times more than the noise power .The higher the SNR value , the smaller the noise。(Equipment/electronic circuit option）
4）Noise：Noise cause irritability, or the volume is too strong to harm human health.So we need to control the noise in a limited range,Otherwise it will affect the quality of electronic products(Equipment/electronic circuit option）
5）The amplitude of the sound：The amplitude of the sound to determine the size of the sound.so the amplitude test can test a product the size of the output sound(Equipment/electronic circuit card option）
6)Frequency Response：the full name called the range of frequency response，also called Frequency characteristics.Frequency response is usually measured within the range of human hearing, from a low of 20Hz to a high of 20kHz, although some believe that frequencies above and below this range, known as wideband frequency response are equally important. Frequency response specifications indicate how well the device remains uniform. For example, a frequency response specification of 20Hz-20kHz +/- 3dB indicates that the maximum variation in level or volume from the lowest to the highest tone will not exceed three decibels. A range of three dB is common in frequency response specifications.
The system uses a common international test software labview write the test program,using the computer to auto-control the test card and Equipment to realize The purpose of automatic test.this test system test high speed and the test is very stable.Well received by users.
