In the micro-movie just now, the agent was able to complete the task "thrillingly" by virtue of a mysterious mobile phone function. This is also the protagonist we are going to talk about today - the smart privacy call function of honor Magic4 Pro.
The so-called smart privacy call is to ensure that the information in the earpiece is only transmitted to the user himself, and will not leak to the people around him. This function not only protects the privacy of the call, but also supports apps such as WeChat that call into the microphone. Friends with life experience will know that in some quiet occasions, even if you do not turn on the speakerphone, the people around you can hear the contents of the phone clearly, causing unnecessary embarrassment or privacy leakage. Therefore, this function may not be too concerned about it, but it can play a big role in key times.
In our small test, we all ensure that the same operator's mobile phone card and sound source distance are the same, respectively, using honor Magic4 Pro and iPhone 13Pro Max to test the call volume, the sound volume of both mobile phones at close range is around 50 decibels, indicating that the volume of the two mobile phones to answer the phone is not much different.
Next, we did a leak test. Put the voice recorder with speech recognition function in a position 20 cm away from the mobile phone, when both sides answer the phone at the same time, the iPhone group of voice recorders can recognize most of the text, indicating that there are many missing sounds, and the glory group does not directly recognize the text, and the audio clarity is also much worse. When we pull the distance farther away to 40 centimeters, the iPhone group can still recognize very little text, the honor group is still unrecognizable, and there is almost no effective information in the audio.
So how far away do you have to be so far away that you can't hear clearly? To this end, we have specially done a simulation test of the nature of the game in the shooting room for your reference.
We turned both phones on to 100 percent, and then a colleague sat 1 meter away and she repeated the new words in the microphone to see how correct they were.
At a distance of 1 meter, all three words in the iPhone group are correct, but the three words in the glory group are wrong twice.
We also tested the performance at various distances (all at 100% volume + ambient noise close to 40db) of the phone, and the results were interesting. The iPhone group, our colleagues after challenging 1 meter, and then continue to challenge 1.25 meters and 1.5 meters, the accuracy rate is very high: but the honor group, is constantly reducing the distance, even if it is only 40cm, there will still be repetition errors.
According to this colleague, the sound coming out of the Glory earpiece is not only smaller in volume, but also the sound quality has become very thin, which leads to always repeating errors. So why is this happening?
The reason is that the smart privacy call adopts a dual-unit fusion sounding solution. The Magic4 Pro has not only an earpiece sound unit, but also a screen sound unit. Honor's scheme combines the strengths of the two, on the one hand, the frequency band that the earpiece is easy to scatter out is weakened, on the other hand, the human voice band of the screen advantage is prominent, the two fuse the sound, and control the radiation direction of the sound field, and finally produce a call effect similar to directing sound. Therefore, only when answering the phone at close range, the low-frequency and high-frequency sounds are just blended, and we will hear the most natural sound quality, and once the mobile phone is pulled away, the low-frequency sound is missing, the sound quality and information amount become incomplete, and what our colleagues call "thin" sounds appear.
It may sound like it's not hard, but it's not easy to implement. Technicians need to accurately calculate the synthetic sound field of the two sound systems in the ear to find the most balanced ratio; at the same time, they must also pay attention to the synthetic sound field leaking out from different directions to ensure that they are not exposed or at least inaudible; in order to better experience, the new screen sound unit of Honor uses a higher cost ceramic device and integrates a number of self-developed patents, and finally this solution is perfectly landed.
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