扬声器又称“喇叭”。是一种十分常用的电声换能器件，在发声的电子电气设备中都能见到它。
(1)扬声器有两个接线柱(两根引线)，当单只扬声器使用时两根引脚不分正负*性，多只扬声器同时使用时两个引脚有*性
之分。
(2)扬声器有一个纸盆，它的颜色通常为黑色，也有白色。
(3)扬声器的外形有圆形、方形和椭圆形等几大类。
(4)扬声器纸盆背面是磁铁，外磁式扬声器用金属螺丝刀去接触磁铁时会感觉到磁性的存在;内磁式扬声器中没有这种感觉，
但是外壳内部确有磁铁。
(5)扬声器装在机器面板上或音箱内。
Hi-res是由JAS (日本音频协会)和CEA (消费电子协会)制定的高品质音频产品设计标准。
Hi-Res是High Resolution Audio的缩写，而High Resolution就是高解析力、高分辨率的意思，这个词在图像显示领域运用得
比较多，比如说4k分辨率就可以
High Resolution来形容，如此一L 来，High Resolution Audio就是高分辨率音源的意思。
Hi-Res是评价它的Sony爸爸和飞利浦爸爸合力推出dsd音频的高保真超**水平的形容词，有**的音乐，自然也有-流的耳机
，所以HR也用来表示频响范围超过5-40k hz的耳机。
现在Hi-res已经快成为高端音频设备必备的一个认证标志
HiRes随身影音具备了全音域、高码率的能力，意味着随身影音产品迈进一个新的时代。更丰富的细节、采样深度更高，对音源
的追求更上- -层。对于硬件产品来说，如果你拥有出色的符合Hi-res认证的硬件产品，那么相比参数不够得到认证的产品来说
拥有更加出色的表现。这些得到认证的耳机也-定都是市场中非常优秀的产品。
Test info测试要求
1.In principle, the definition of "Hi-Res" is based on the announcement of Japan Electronics and Information
Technology Industries Association (JEITA) onthe March 26. 2014
2. "Hi-Res" applicable products JAS defines is to fulfll the fllowing specification on the recording,
reproduction and signal transition process
(1) Microphone response performance: 40 kHz or above during recording
(2) Amplification performance: 40 kHz or above
(3) Speaker and headphone performance: 40 kHz or above
(1) Recording format: Capability of recording using the 96kHz/24bit format or above
(2) I/O (nterface): Input/output interface with the performance of 96kHz/24bit or above
(3) Decoding: File playability of 96kHz/24bit or above (FL AC and WAV both required)
(In case of self-recording equipment, FL AC or WAV file is requred as minimum condition)
(4) Digital Signal Processing: DSP processing of 96kHz/24bit or above
(5) DIA conversion: Digital to analog conversion processing of 96 kHz/24 bits or above
3. Listening evaluation process is to be organized
(1) Listening evaluation process is required by each applicant.
(2) Each applicant must assign the audio/sound quality control manager in addition to the product quality
control manager.
(3) The audio/sound quality control manager should be responsible for final decision as Hi-Res Audio product to
be proved according to each company's sound evaluation standard.
Rre-testSample size预测试送样规格:八对成品，8pairs finished products似及一个详细介绍产品的URL链接Audio products
URL
Lead time项目周期:十到十二周，10-12 weeks
The purpose of video interview视频面试要求
The purpose of video interview is simply to see each other as "Seeing is Believing".
And precisely, we'd like to hear from you about your company, brand, business history, expertise, target
market, sales force, etc., in addition to the inquiry to
what you reported.
