ExAct is a dynamic exhaust silencer for all types of combustion engines.
It reduces low-frequency noise in real time, regardless of engine acceleration.
It simplifies and reduces the size of traditional exhaust pipes.
Exceptional attenuation of loud noises in low frequencies.
Reduction of tones level (engine rotation frequency) to the background noise.
Reduction in the fatigue caused by low frequencies.
Improved alertness by avoiding prolonged exposure to a noisy environment.
Low energy consumption.
Limited loss in pressure.
Improved acoustic comfort.
Limited added mass.
The device consists of an oscillating flap fixed onto a shaft and introduced into the flow of the exhaust pipe to produce a sound.
The oscillating flap is driven by a direct current motor.
An electronic control module operates the entire system to reduce fluctuations in flow and acoustic energy in real time. The system is patented worldwide.
Example of active acoustic attenuation of exhaust systems
High mechanical and thermal resistance (~ 1,000°C).
Works with a low-power direct current electric motor ( ~ 100 Watts).
Real-time noise control electronic board.
Buses, trucks, etc.
Agricultural and military vehicles.
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