Page 84 - Technology Roadmap Transportation

TECHNOLOGY VISION 2035

TABLE 4.7 NOISE CONTROL TECHNOLOGIES

Name of Description Remarks Investment Required
Technology

Vibration Dampers are used to
Vibration Dampers eliminate or reduce structural Technology used for Investment required for
all vehicles
indigenous development
resonance and vibration

Sound Absorbers are primarily
used to soak up mid band and Technology used for Investment required for
Sound Absorbers
high frequency airborne sound all vehicles indigenous development
and reflect thermal energy

Sound Barriers are used to block
and reflect high energy airborne
Sound Barriers sound like road noise in the form Technology used for Technology needs to be
imported
all vehicles
of exhaust, airflow, drivetrain
and tyre noise

Gasketing Materials are used to
Gasketing eliminate squeaks, rattles and Technology used for Investment required for
Materials all vehicles indigenous development
buzzes and to seal speakers

EHC uses vehicle's audio system
Engine Harmonic to produce a signal acoustically Technology used for Technology needs to be
Cancellation (EHC) opposite to the undesirable passenger cars imported
sound and effectively reduce it

Acoustic Used for virtual noise mapping Technology used for Technology needs to be
Holography all vehicles imported

Anechoic Used for experimental noise Technology used for Investment required for
Chambers mapping all vehicles indigenous development

82 ROADWAYS