Aluminum foil, wooden ruler, best cotton and nylon rope which sound effect?Talk about reason ~!
You ask the spreading speed and effect? Spreading velocity and effect is not the same thing, if it is the propagation velocity of aluminum foil is the fastest, followed by a wooden ruler, again thread, the slowest is nylon.
There are differences in ~ with the actual situation, maybe a few people will know the truth, the sensitivity is not the same, there is a nylon rope must be in tight situations, it is difficult to define, is mainly to develop the students' ability of doing so can ~ ~ ~ ~ you estimate Both scientists are confused
The speed and objects spread density, stiffness, if more clarity should be spread in cotton, nylon rope is taut nylon rope case, the most clearly heard, then thread the wooden ruler, finally heard the effect is like some foil, mobile phone signal strong and weak, but a lot of people's ears most strongly reflected on the metal material of different sensitive degree is not the same, but may.
