Ultrasound independent Advisory Group on Non-ionising Radiation (AGNIR) produced a report in 2010, which was published by the UK Health Protection Agency (HPA). This report recommended an exposure limit for the general public to airborne ultrasound sound pressure levels (SPL) of 70 dB (at 20 kHz), and 100 dB (at 25 kHz and above). Ultrasound Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz (20,000
Less Is More (Lost Frequencies album) Less Is More (Lost Frequencies album) Less Is More is the debut studio album by Belgian DJ and record producer Lost Frequencies. It was released on 21 October 2016, by Lost & Cie under exclusive license to Armada Music and Ultra Music. The album was shortlisted by IMPALA (The Independent Music Companies Association) for the Album of the Year Award 2016, which rewards on a yearly basis the best album released on an independent European label. "Are You with Me" was released as the first single on 26 January 2015. "Reality" (featuring Janieck Devy) was released as the second single