Combustion processes generate a band-limited pseudo-random sound that is often referred to as “combustion roar.” Although combustion roar sound is moderately intense but it is rather straight forward to quiet to a non-objectionable level by properly applying sound absorbing material around the burner area. In addition to the 'roar' sound which almost always exists in any confined combustion, on...

Auroral roar, a narrowband (Sf/f < 0.1) emission near 2 and 3 times the ionospheric electron gyrofrequency (2f• and 3f•), is observed with a meridional chain of LF/MF/HF radio receivers located in northern Canada spanning 67 ø to 79 ø invariant latitude. Observations of these emissions are compared with the auroral electrojet location inferred from the Canadian Auroral Network for the OPEN Prog...

Lamenting songs are one of the genres in Tamil literature. Music is intertwined life village people. Lamennting sung to express feeling sorrow that arises one's heart when a mother, father, husband, child, sibling or relative dies. People who do not know about history dead people they can learn person’s through those songs. A musical instrument known as Roar played death house. The sound roar a...