SCIENTIST’S THEORY.

Manawatu Herald, Volume XLVIII, Issue 2989, 21 January 1926, Page 1

SCIENTIST’S THEORY.

“WIRELESS CARRIER WAVE.”

LONDON, Jan. 4. 'J’lio Hastings Council commissioned the scientist, Professor A. M. Low, to solve the mystery of a noise known as the “Hastings harmonic,” which is like a vast organ note, preventing sleep lor residents ol' certain districts. Professor Low photographed the noise and discovered that a slight hum by the generators of a distant powei station acted as a sort of wireless carrier wave, on which other noises accumulated and were magnified and projected several miles. EFFECTIVE SOUND-ABSORBER. Professor Low explained that the hum of tho Hastings power station could not bo detected at close quuiters because tho human ear could not hear noises of certain \va\lc-leng hs. It was easy to whistle a note that a dog could hear, but which a man could not. Nature, when improving the human brain, lessened the powers ot hearing, otherwise man would soon bo driven mad. , . .. Ho (Professor Low) had discovered that a mattress of Saragossa cel grass was tho most effective sound-absorbci for the walls of noisy offices and factories. He had demonstrated that a small casket of this for attaching to a pillow guaranteed a sleeper against disturbance by street noises or neighbors’ altercations.