新的iPhone4 仅是9.3毫米厚（比3GS薄出15%)，将内建两颗摄像头（一颗前置，一颗后置并配有LED闪光灯），并将拥有两个扬声器实现噪声抑制技术。

The iPhone 4 is 9.3mm thick (a quarter thinner than the iPhone 3GS) with two built-in cameras (one on the front and one on the back with an LED flash), and two microphones for noise cancellation.

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风机噪声达到国家标准，且距风机机壳外1米处的噪声不得大于85分贝。

With noise level held to meet national standards, the noise 1m away from fan cover should be confined below 85 dB.

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本数值基础，是按照标准化，在封闭空间内1米的距离仅仅针对变速箱纯噪声的排放进行测试的。

This value basis, as per the standardization, exclusively on the pure noise emission of the gearbox in an enclosed area measured with 1m distance.

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