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iPhone 4S incorporates noise reduction technology from Audience inside the A5 chip itself

Another possible reason for the iPhone 4 not to have Siri (virtual assistant available only on the iPhone 4S): the A5 chip. According to documents sent to the SEC (Securities and Exchange Commission), Audience revealed that the iPhone 4S (more specifically its processor, the A5) incorporates proprietary technology called earSmart, capable of canceling noise.

<img class = "lazy lazy-hidden aligncenter size-large wp-image-187068″ title=”EarSmart banner” data-lazy-type=”image” src=”×205.png” alt=”EarSmart banner” width=”600″ height=”205″ />

Many may wonder: "But the iPhone 4 didn't have that already?" Yes, he already used a noise cancellation system, only that, instead of having a specific chip for that, the iPhone 4S incorporated such technology inside its own processor which further explains why its size.

For analyst Linley Gwennap, of the Linley Group firm, this situation "helps to explain why Apple does not offer Siri as a software update for the iPhone 4". As technology improves, users do not necessarily need to speak with the phone next to their mouths in order for the content to be identified correctly, as the earSmart voice processor distinguishes and interprets sounds naturally. It basically isolates, increases the main voice signal, suppressing the surrounding noise, the results are clearer conversations, even with the device as close to the mouth.

<img class = "lazy lazy-hidden aligncenter size-large wp-image-187067″ title=”EarSmart technology” data-lazy-type=”image” src=”×188.jpg” alt=”EarSmart technology” width=”600″ height=”188″ />

We can?t say for sure, but as Apple couldn?t guarantee the smooth operation of Siri on the iPhone 4 (even less on iPod touch, which doesn?t have such ?neat? hardware), this may be one more explanation of why such iGadgets not having Cupertino's virtual assistant.

On a related note, the company's third noise reduction chip is coming out of the oven, however, even with a license agreement already established with Ma, there is no guarantee that it will put such technology within future iProducts although this is the natural way of things.

(via CNET News)