Show soundproof laboratory so quiet a dollar bill makes noise when it falls on floor A dollar bill makes a noise when dropped on the inch thick carpet of a new soundproof lab laborati labora tc room writes a schenectady N I 1 correspondent in the boston globe the bill gives out a sharp whack it if it falls sat flat it can be heard scrap ing if it comes down at an ingle angle the room is something new in soundproofing it weighs 30 tons and Is h hung ang from the root roof of the research laboratory by tour four rods sleeves make a cre creaking aking sound when they brush against a coat A watch chain clinks when its wearer walks tightening a trousers belt sounds like harnessing a horse the idea of the room la is to take me lae lost last small noises out of 4 rotating machinery malost malast it was built after scientists thought U they ey had all the noises out because none could be heard in the ordinary laboratory quiet but these same motors taken into the country on a quiet night were still audible the hanging room was thereupon constructed to imitate the country at its stillest in cities and large buildings there always Is a slight rumble of noise even at the quietest moment the soundproof room is built jt if steel ELLIA concrete its mass alone cutting out most nf if the outside noises the walls are further lined with soundproofing materials and the heavy carpet Is with thick felt fell entrance is through a vestibule which closes when the quietness hunters pass through a door from it into the room proper the long supporting rods do not touch the root roof they are connected with steel springs set in rubber to prevent them from acting as sound and vibration conductors A person with indigestion in this room does not have to tell his friends what is the matter his stomach can be heard rm rumbling bling one result of this kind of work is s super quiet electric fan blades theres not a single entirely sat flat area on their faces neither do their curves at any cross section equal those of any other area their greatest width is almost at the tip ble meaning aning of absolute music the term absolute music is applied to music of a purely abstract type devoid of any nonmusical non musical or extra musical significance as distinguished from that of a pictorial or descriptive kind known as program music |