Exposure measurements for ultrasound in air

Everyday we are exposed to a world of sounds that we do not hear. Many of the sounds come on the edge of our hearing range and some are even audible to a small part of the population. This presentation relates experimental measurements of sound exposures in the high-frequency regime that we are not intended to hear. There has been recent speculation about whether the regulations in the near-audible (or audible for a small population) regime are sufficient. Whether it is annoyance or some other mechanism that affects some part of the population is unknown, but this data present an idea of what exposure we receive at the edge of our hearing range.