As a result of our work

Audi A7 noise level before and after STP noise insulation

• 1 Decrease by 2 dB - low frequencies - reduced engine noise and health hazard
• 2 Decrease by 5 dB - medium frequencies - reduced the hum from the exhaust system and noise from the road
• 3 Decrease by 3 dB - high frequencies - eliminated the highest degree of the squeak formation
• 4 In the general range, a decrease by 2 dB – it is getting quieter by 21%, roughness of the road is unheard, the hum of the exhaust system was removed, comfortable talk with the rear passengers, added bass in our acoustic system sound, we got a car of Luxury class in terms of noise level. Anticorrosion and thermal insulation are in addition to all received pleasant bonuses