Below 20 Hertz: The Rumbling Realm Of Infrasound

Artwork by Andy Gilmore

Infrasound is the realm of sounds in the frequency range of 20 Hz down to 0.001 Hz. According to Harry F. Olson in his book Maths, Physics and Engineering: 20 Hz is considered the normal low frequency limit of human hearing. The lower the frequency of sound, the more difficult it us for human to hear it. So, in order for us to hear a sound under 20 Hz, it must be powerful. We mostly hear infrasound through our ears, but at higher levels it is possible to feel infrasound vibrations in … [Read more...]

Tactile Sound: The Overlooked Gateway

tactile-sound-thumb

One of the main investigative areas at Reactual Labs is tactile sound. So what is tactile sound exactly? It is the sensation of sound transmitted directly to the human body by contact, rather than by sound waves through the ears (tympanic sensation). More specifically, it is sound perceived through bone conduction, through muscles and deep tissue, and via skin sensation. We perceive the vibrations through our haptic senses which include both kinesthetic (muscle) and touch (cutaneous) senses. … [Read more...]