A cardboard box with an electric bell suspended in it by elastic bands is used to test the soundproofing qualities of some materials.A) Why the bell is suspended with elastic bandsB) Why is it important to have same thickness of each material.C) Suggest a way of measuring sound coming from the box.D) The materials used in the experiments are newspaper, egg box card, crumpled aluminium foil and a plastic form sheeti) the best soundproofingii) the least effecting soundproofing
:) i wish great success to youyou can pull the rain clouds from UK and send us some sunshine.
Rain would be great.After August we will be waterless in Ankara.:((And a week ago I poisoned because of drinking water from home's tap.
No, we go out for a rain prayerWe dance around a bucket of water representing rainAt least it will be fun.
He became right into a superb electric powered engineer who began out working for EdisonHe had to discover the thank you to furnish every person with loose electrical energy and get it to them without using wiresHe became into way earlier than his time3.
A) To prevent vibrations of the bell from reaching the outside of the box by direct contact, thus finding a a way past the insulation materialThe lestic bands will not transmit vibrations very wellB) So that you have a fair comparison of the materialsC) Measure the voltage output of a microphone mounted outside the boxD) i) and ii)Well, trhat's what you have to find out by the experimentsMy tips would be the egg box card as best and the aluminium foil as worst but since I don't know exactly what (for example) a plastic form sheet is, I can't be very sure.
