Noise tau (Function Value)

Function value	Attribute	Unit	Per category	Range	Description
Noise tau	TRAFFIC_NOISE_TAU	dB(A)			Difference in noise intensity of vehicles for every order of magnitude difference with their reference speed. Effectively a speed-dependent modifier in noise.

Used for

• Traffic Noise (Indicator)
• Traffic Noise (Overlay)

Model-specific articles

• Noise tau (Traffic Noise Overlay)