Where does the BMW 3 Series analog sound wave open?

Pacific Auto Network BMW 3 Series simulated sound waves are turned on in the center console. BMW installed a loudspeaker near the engine throttle, and further enhanced the sound effect of the engine with the help of audio files in the driving computer. At present, this system is installed in high-performance vehicles such as Volkswagen Golf GTI (parameter | picture), Sagitar GLI (parameter | picture) and Golf R.

How many people fall in love with a car because of the sound? There is no doubt that the sound of super running is sometimes even more attractive than appearance. Not only for spectators, but also for drivers, sound waves can make them more passionate and more focused on driving.

However, some of these sounds are not completely emitted by the gas emitted by the engine. Because some engines with small displacement cannot produce so much exhaust gas to produce rich sounds, some car companies try to make vehicles emit simulated sounds to achieve the purpose of confusing the real with the fake.

How to make a simulated sound wave Ferrari also tampered with ExhaustBypassValve to make its sound eye-catching, but LaFerrari's voice is real. Ferrari has a variable valve in the exhaust pipe. When the vehicle is at a low speed, the valve is closed and the exhaust sound is brewing. Once the vehicle speed rises, the valve opens, more exhaust gas is discharged, and the exhaust sound becomes louder.

BMW's M5 adopts the above-mentioned similar sound packaging method, giving drivers a better hearing effect. The system is called ActiveSoundDesign, and its working principle is to record the sound waves of the engine in advance, and then the driving computer automatically adjusts the sound effect according to the actual running speed of the engine. Therefore, it is not unreasonable for many people to call BMW a sound master.

Lexus signed a contract with Yamaha to design better engine sound effect, and installed sound generators imitating engine sound on RCF, LFA and other models. Of course, the sound of LF-A itself is also very moving. After all, it is a large displacement V 10 engine.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)