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Physical multichannel headset technology

Physical multi-channel headset, compared to the traditional headset is the biggest difference is that there are multiple speakers unit. In the eyes of many readers, it would be incredible to put multiple speaker units into small headphones. And in a small space so that they work together to provide multi-channel sound is also magical

What is a physical multichannel headset? What is the difference between it and traditional stereo headphones?

Physical multi-channel, that is, the real multi-channel decoding and multi-channel playback, rather than in the playback side simply use two speaker units, and then through the sound processing to simulate multiple speakers of the virtual multi-channel products.

The physical multi-channel headphones feature true multi-channel digital decoding output with a built-in high-performance decoder chip that supports 7.1 channels. For the weight of the headset, human comfort and practical aspects of the consideration, the current physical multi-channel headphones in the design is usually only use 5.1-channel, that is, 6-channel output, namely: front left (FL), (FR), center (rear), rear left (RL), rear right (RR), and subwoofer (SUB-Woofer, achieved by vibrator). While the traditional stereo headphones only two channels L, R, it is easy to see the physical multi-channel headphones and traditional stereo headphone output difference.

As the general headset no speaker left and right channel mutual effect; left ear can only receive the sound of the left channel, the right ear can only receive the right channel sound, lack of monaural mixing of the two channels. So we usually use the headphones to listen to music have the following questions: the main effect of the main sound of the main instrument is serious, most of the sound source can not accurately locate the left and right direction of the sound source separation is clear and vertical separation, the lateral, Head, underground and other direction of the positioning is powerless. The multi-channel headset to restore the sound effect than the stereo headphones better, the output channel segmentation changes, the sound positioning more accurate.

How does it tell if a product that claims a surround sound headset uses physical multichannel technology?

Multi-channel technology requires a separate set of pickups for each channel when recording. 5.1 channel system will need more than five complete signal channel, each channel will be a professional IC chip is responsible for independent operation.

From this point of view, distinguish the physical multi-channel headset method is very simple. If a headset claims to have 5.1 or 7.1 surround sound, but the actual product specifications but only two speaker unit parameters, and the use of SRS or Dolby headset technology, then the basic can determine it is not a physical multi-channel headset, but with the help of Virtual surround sound technology to achieve the virtual multi - channel headset. In addition, because 5.1 surround sound needs professional 5.1 hard decoding IC chip master, so whether the headset with 5.1 surround sound hard decoding function built-in sound card can also be used as the criteria and basis for judging.

Usually using SRS or Dolby headphone technology products, are not physical multi-channel headphones

What is the principle of a physical multichannel headset? Do you need a multi-channel sound card to drive it?

Can achieve multi-channel voice of the prerequisites, you need to have a multi-channel source. This kind of sound source in the recording has been a specific recording method for multi-channel sound regularly regular recording, that is, each channel signal is independent of the full-frequency signal. Now mainstream multi-channel recording technology DTS, Dolby Digital 5.1, EAX (3D games) and so on. The reduction of the recording source is decoding, the prerequisite for decoding must be consistent with the recording sequence, the same phase, otherwise lead to channel disorder or phase delay or reverse phase. On the current market of physical multi-channel headphones, usually built-in USB multi-channel output sound card, the chip supports up to 7.1-channel decoding output, and with a 3D driver to match the chip to select the appropriate decoding and playback mode. Of course, the market also has no USB multi-channel sound card products, but they need to meet the user's multi-channel sound card to achieve physical multi-channel effect.

How does a physical multichannel headset allow multiple speaker units to avoid interference in small cavities?

The physical multichannel headphones are designed using separate separate space bits. That is, in the cavity, each channel placed a single speaker has a separate cavity. The loudspeaker unit is satellically distributed along the user's auricle so that the user's perceived sound is maximally compatible with the 5.1-channel sound experience. Among them, the left and right channels of the speaker unit, respectively, set in beats by dre studio the posterior position of the auricle, so that through the diffraction effect, the acoustic reflection of the line can be close to the sound source after the sound into the ear path. By the same token, the central channel is placed just above the auricle and is close to the refraction of the sound emitted from the central sound source into the auricle. In general, we are more sensitive to the front channel, low frequency is generally considered to be useless, and therefore in the front left and right channels using a high-quality full-range speakers, set in the ear canal Position, taking into account the main channel and low-frequency response, so that the sound waves into the ears of the shortest route, so the effect is most obvious.

In addition to ingenious independent cavity design and unique speaker solutions, the physical multi-channel headset will also use the sound-absorbing cotton, the reflected sound waves as much as possible to enhance the channel isolation to avoid mutual interference or crosstalk.

How do the physical multichannel headphones adjust independently for each channel?

Analogue headphones, using real 5.1-channel decoding and playback, so each channel has a separate output line. And in the output circuit in series to adjust the volume of the potentiometer, you can separately, front (rear), center, subwoofer to adjust the volume.

For a physical multi-channel headset with a USB sound card, is it in 5.1 channel mode when plugged into the USB interface? Or need to set up another?

In general, the physical multi-channel headset in the drive running state default is 5.1 channel mode, this mode supports cinema effects and 3D games. However, the user's daily application is a wide variety of applications, so the driver usually allows the user to adjust the other channel output settings in the 3D interface according to personal preferences, such as headphones, two-channel, four-channel, eight-channel output mode The

What physical loudspeaker headphones do not use uniform size?

First, the 27mm VIB inertial vibration unit is designed to achieve better low frequency feedback with a smaller volume. At present the vibration unit has become the Somic product standard vibration monomer, the other application of low-frequency real-time dynamic feedback technology headset products also used to it. It can be based on the degree of intense scenes in the game to calculate the size of the acceleration, and synchronization buffer electrode plate vibration intensity, for the player to restore the extreme realistic battlefield scene. Second, the front channel as the main channel output, the home, rear (surround) channel, as the surround output, combined with the ear shell volume to take the best program, so as the main channel of the front selection of 40mm single Body, and the rear and rear selection of 30mm monomer, so that the bass effect and dynamic performance more advantages, and the overall frequency response is more broad and flat.

For multi-channel audio systems, the center and bass parts are relatively special parts (they are not symmetrical sounds), in the physical multi-channel headphones, these two parts is how to consider? What is the maximum design difficulty for a physical multichannel headset?

Multi-channel headset design The biggest design difficulty is the cavity design. As a result of the simultaneous placement of multiple sound units, if the cavity design is improper, the cavity will form a short circuit cavity, resulting in channel regardless of the frequency band chaos unclear, so the cavity design needs to achieve the channel isolation. In addition, due to the limitations of the headset cavity, positioning space is not so spacious home theater, so a reasonable positioning requirements has become the main difficulty in the design of the cavity. And well-designed headphone cavity, can effectively inhibit the EMI interference between the units.

In multi-channel recording, the center or subwoofer part is the use of a single channel recording, in the sound reduction, the same only a single channel output, there is no stereo problem. In the sound reduction, in order to achieve the central voice, will be around the center speaker and then together, you can play the effect of the central voice. The bass part of the playback design is the same.