Civic Type R - Engineer Talk 09
"We aimed to provide lively sound to the occupants, when needed"
Sports Sound Engineer
Our aim in developing the new Civic Type R’s sound characteristics, in the areas of vibration and noise, were that although sports driving would produce a powerful sound, unwanted noise and vibration would be suppressed during cruising.
To achieve this, we carefully determined the positioning and spring settings for the mount supporting the engine and transmission so that it had the high support rigidity needed for a Type R model, yet effectively blocked vibration. We then optimized the positioning and amount of sound insulation and damping materials, and tuned the exhaust silencer.
During development, the flywheel was made lighter to improve engine response. This had a slight impact on the engine noise volume and frequency, so we revisited the exhaust sound for congruency.
“My expertise is sound, mainly controlling vibration and noise,” Osamu Matsuda commented.
“Vibration is an important issue for a car’s occupants, but not so for people outside the car. On the other hand, noise not only affects both occupants and people outside the car, but is regulated in each country, making it a complex matter.
“The new Type R is a global model, so we have to consider it being sold in regions all over the world. It has to have a powerful sound on a race track, yet while cruising, we have to shut out as much unwanted noise and vibration as possible. What becomes important is a clear distinction between delivering pleasant sound to the occupants when needed, while minimizing unwanted, unpleasant noise and vibration.”
To achieve this, the team carefully determined the positioning and spring settings for the mount supporting the engine and transmission so that it had the high support rigidity, yet effectively blocked vibration. The team then optimized the positioning and amount of sound insulation and damping materials, and began designing the exhaust silencer to produce an authentic Type R sound in and out of the car.
“That’s when we had to revisit the exhaust system,” Matsuda recalled.
“The development team decided to reduce the weight of the flywheel, a component within the transmission, in order to improve engine response. This component rotates with the engine at high speeds, so even a minute change in weight slightly changes engine rev and noise volumes and frequencies. The new Type R was no exception, and we heard new sounds with the new flywheel. We overcame the new noise by slightly increasing the exhaust sound over the new rev range, managing to create a congruent sound overall.”
Civic Type R - Enginner Talk
01. Knowing, Experiencing the Type R's Intense Driving Pleasure
02. "Good" Not Good Enough: Type R Needs to be "Exciting"
03. Pursuing Ultimate Handling: Better Than Any Previous Type R
04. The Ability to Adapt to Any Scene
05. Manual Transmission Easy Enough for Anyone
06. Carrying on the Type R Drivability Tradition
07. Braking Performance Worthy of the Type R Badge
08. Every Shape Stylish and Aerodynamically Motivated
09. Lively Engine Sound for the Occupants, When Needed