But this situation is changing, Hisense's newly released ULED ultra-definition TV NU7700, the first application of the "air sound field" technology, performance in the bass range below 60Hz as the name of the ultra-thin TV: thinness and sound quality can have both. So what is the "air sound field" and how does it perform? What kind of technology is this black technology that sounds a little bit mysterious? Most traditional TVs use phase-reversal speakers (also known as low-frequency radiation speakers). Inverter holes (grooves) are opened in the speaker panel. The sound in the cabinet can be radiated to the outside. When the speaker is working, the sound waves radiated from the back radiate to the front after passing through the inverting tube, superimposing with the sound wave in front of the speaker, and then jointly radiating forward to enhance the low frequency effect. The appearance of a reversed-phase speaker makes it possible for a small volume to exhibit good bass. However, with the development of ultra-slim TVs, the phase-resolved speakers still cannot meet the requirements of the thickness of the TV on the volume of the speakers, and naturally the bass effect is greatly reduced. This is why LCD TVs are getting thinner and thinner, and the original quality is better. The quality of sound is worse than that of previous old TVs. It is precisely because of the incomprehensible obstacle of volume that many TV manufacturers simply open up another way and give up the built-in speakers and use the external Soundbar. This can indeed guarantee the sound quality performance of high, medium and low frequency bands, but it destroys the integrity of the television. The additional connection lines make the wiring more cumbersome and do not meet the concise design concept. So, can the built-in speakers still have a breakthrough in bass? Hisense NU7700 gives a positive answer. The NU7700 uses a dual-mode resonance ultrasonic sealed sound box, which belongs to a closed-type speaker. The closed-type speaker is a speaker that is completely closed in addition to the speaker mouth. This is a totally different speaker structure from the conventional inverted speaker. Its main feature is that the pure bass sound is clean and the volume can be made smaller. At the same time, in order to make full use of every inch of space to enhance the bass, Hisense NU7700 adds two passive radiators. The so-called passive radiator refers to the passive unit in the sound. The active unit in the cabinet passively vocalizes the air in the cabinet. One of the great advantages of audio systems equipped with passive radiators is that they can transfer the bass-producing burden of small-sized bass units to passive radiators of a larger size. Therefore, the bass sound area of ​​the Hisense NU7700 increases to 2.7 times that of the original. The volume of the sound is only 1/10 of the same effect. When the normal sound bass is only 120Hz, the influence series can reach 60Hz super bass. This point has been verified by the National Digital Audio, Video and Multimedia Product Quality Supervision and Inspection Center. At the same time, it also makes bass and mid-frequency response more accurate and better. Twinkle System Technology Co Ltd , https://www.pickingbylight.com
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When it comes to Hisense TV, many people think of "ULED super quality." Indeed, after so many years of independent research and development, Hisense has already stood on the leading quality of domestic TV. The high-end MU9600 series already has such international brands as Sony and Samsung. Dachang's top flagship products are emboldened. But in terms of sound quality, it does not seem to set off much movement. Not only Hisense, but in the ultra-thin trend, the sound quality has become the Achilles heel of the entire TV industry.