True or False: The higher the velocity of air flow in a duct system, the noisier the system tends to be.

The statement is true because an increase in the velocity of air flow within a duct system generally leads to a greater generation of noise. This phenomenon occurs due to several factors.

As air moves faster through ducts, it creates turbulence, resulting in a higher level of sound. The intensity of this sound can be amplified by the duct's material and design, which may transmit sound more readily than other materials.

Moreover, when air flows rapidly, it can lead to pressure fluctuations and irregular airflow patterns, which contribute further to overall noise levels in the system. Thus, the relationship between air velocity and noise generation is a significant consideration in the design and operation of HVAC systems, underscoring the practicality of maintaining balance between efficiency and acoustic comfort.

Other responses may address specific conditions or factors that influence noise, but none fundamentally contradict the correlation between higher air velocity and increased noise levels in general.