1) Weather forecasting
Found on
https://www.crosswordclues.com/clue/infrasound
Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz (Hertz) or cycles per second, the `normal` limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary org.....
Found on
http://en.wikipedia.org/wiki/Infrasound
According to the International Electrotechnical Commission's (IEC's) IEC 1994, infrasound is: Acoustic oscillations whose frequency is below the low frequency limit of audible sound (about 16 Hz). However this definition is incomplete as infrasound at high enough levels is audible at frequencies below 16 Hz. (From AWEA & CWEA report into the health...
Found on
http://ramblingsdc.net/Australia/WpGlossary.html
acoustic oscillation whose frequency is below the low-frequency limit of audible sound (about 16 Hz)
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=801-21-03
Acoustic waves below 20Hz are normally inaudible, but may be experienced as being in a region of high pressure.2-5Hz range played at 100-125dB may produce difficulty in swallowing and slight post-exposure headache.2-5Hz range played at 125-137dB may produce chest wall vibration; difficulty in speaking and voice modulation; swaying sensations; letha...
Found on
https://www.encyclo.co.uk/local/20687
sound with frequencies below the audible range.
Found on
https://www.infoplease.com/dictionary/infrasound
No exact match found.
