Car speaker
1. Characteristics of car speakers
Car speaker store, in addition to the host and power amplifier, you will also see a lot of different styles, small and compact car speakers, you may think that the same as the general home audio, it is not.
(1), temperature
Household car speakers are used in the room, so the temperature difference is small, and the car works outdoors. As the climate changes, the temperature difference is large, so it is resistant to temperature aging.
(2), humidity
When the car is raining, when there is a water section, and when washing the car, it will be attacked by moisture. Therefore, the car speaker needs to be protected from moisture. Nowadays, the moisture-proof chemical synthetic material cone is used.
(3), dust
The home appliance car speaker is used in the room, so there is less dust and more dust inside the car. A dust cover is needed to prevent the voice coil from rubbing noise.
(4), vibration
The car's car speaker is subjected to vibration shocks during the movement of the car anytime and anywhere, so the design must be firm and not loose.
(5), noise
Considering the various noise and vibration conditions, the materials used are different, and various methods are used to offset different noises.
(6), impedance
The car's power supply voltage is low. In order to obtain high power, the impedance of the car's speaker is small, and 4Ω, 3.2Ω and 2Ω are used.
Classification of car speakers
According to the frequency of car speaker playback, the full-range car speaker, treble car speaker, mid-range car speaker, bass car speaker. The treble car speakers are 80mm (3in), 100mm (4in), 130mm (5in), 150mm (6in), 200mm (8in), 250mm (10in), 300mm (12in), etc. by size. According to performance and usage, it can be divided into: unit car speaker, set car speaker, coaxial car speaker, subwoofer car speaker.
Car speaker modification knowledge - sound insulation steps
1, shock absorption
Damping treatment of four doors, trunks, floor, engine compartment and roof;
When implementing shock absorption treatment, there are primary and secondary points: first, the door and the trunk, because most of the noise is transmitted into the vehicle through the suspension system, trunk, chassis, door and other parts of the car; secondly, the floor of the car and Engine compartment; finally the roof.
2, noise reduction
Sound absorption and noise reduction for the entire car.
3, sealed
When sealing the inside of the car, do not over-seal, because the car body sealing project is the basic project to solve the noise from the outside to the inside. The car body should be well sealed to keep the air pressure in the car. Otherwise, the over-sealing can cause the car. Hypoxia is a danger to your body.
