As an example of a path control, Thalheimer mentioned vinyl noise curtains (available from several manufacturers) that are about one-quarter inch thick and typically have an absorptive side that is placed toward the source of the noise. The curtains can be tucked, hung, and wired together as needed. The absorptive side also reduces reverberant buildup. Noise insulation can even be put around individual pieces of equipment such as jackhammers so long as the device can still be used safely and without damage to the equipment.
Receiver controls limit the amount of noise received or prepare people for what they will hear. They include:
As an example of a receiver control, Thalheimer noted that informing stakeholders of work requirements and schedules can increase their tolerance of noise. Information can be provided on a website, in print, in person, or through social media (e.g., Twitter, text messages), with contact information for complaints. With respect to air conditioners, the associated closed windows and presence of background noise may reduce the level of unwanted sounds, but the conditioners themselves increase the outdoor ambient noise level.