Recently, this reporter visited the market found that "car audio more expensive" become the owner of the share point, these owners generally think car audio price is higher than the price of home audio too far, in the face of the market, many car audio brand, the brand of the difference in price between the models are large, with these questions, interview some of the industry experienced professionals in understanding their views and opinions.
Some experts believe that the reason why car audio price higher than the home audio, the main reason for this is because car audio environment than home audio usage conditions. Interior space of diffraction limited, Sonic, temperature, exhaust fumes, dust, and shock these factors require car audio intrinsically superior quality to resist these environmental aspects are insufficient to enable car audio in different environments are working properly.
Overall volume limit
Car audio volume due to car dashboard area, so the smaller volume. The European vehicle type according to DIN standards requirements (l) 183 x (h) 50 x (d) 153 (mm). Japan automotive multimeter 2-DIN double form, dimensions (l) × 180 (h) 100 x (d) 153 (mm). In a limited volume of, car audio and more using high-density SMD components, the use of multi-layer stereo Assembly structure, in technical design requirements are high, the cost is increased.
Environment of poor
Anti-vibration vehicle traveling in different levels of pavement, make car audio frequently subjected to vibration and shock, so car audio must be structurally to have seismic performance. Therefore many automobile tape playback section adopts horizontal placement, upper and lower fastening ensures stable playback; CD part using multi-stage vibration reduction measures (La spring and damping airbags, ESP electronic shockproof system, etc.); parts welding Assembly requires absolutely firm and individual components more fixed with super glue.
Resistance to temperature difference car audio to endure severe temperature changes in solar irradiation under dashboard temperature up to 70 degrees centigrade-120 degrees centigrade, cold regions can be up to minus 30 ° c-40 ° c below zero, and the home of components subjected to temperature difference as long as the minus 5 ° c-80 ° c, thus on the level of automotive components requires very high.
7、it car audio on prevention of moisture had also taken measures, typically in the components whose surface is painted with moisture-proof agents to protect the line.
Strong anti-interference ability
As the car engine ignition device and various auto electric share a storage battery, it will pass the power cables and other wire interference to sound. Car audio-jamming technology respectively on the power cord of the interference with choke series in power and audio filtering between, on the space radiation interference shielding metal shell seals and sound interference in specialized installation to reduce of IC outside noise interference.
Higher dynamic range
Cars on roads, both direction changes and the influence of external environment (such as buildings, bridges, wire mesh, etc.), to guarantee the normal radio, radio parts in sensitivity, selectivity, signal to noise ratio in high performance, AGC (automatic gain control) and AFC (automatic frequency control) requirements are high; and the use of digital synthesis tuner to ensure radio parts of sensitivity, enhanced seismic and tuning stability.
In addition, car audio and many home audio not available in the function, such as: voice control feature, no need to hand-manipulated simply speak to complete the operation; steering wheel a spin button control, steering wheel mounted controls audio all kinds of work status button, hand wheel, at the same time, you can control the sound; sound indicates features, GPS system provides next operation instructions; volume automatic gain, according to speed and slow air pressure on the pressure changes in the eardrum, or decrease the volume potential with automatic, so that the passenger volume without any changes; dynamic road noise control (DRC), thanks to the wind and engine noise and other noise will make music details are difficult to capture, DRC can automatically enhance the bass and treble, or you can increase the gentle passage to overcome this problem.
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