design lab

来源：百度知道 编辑：UC知道 时间：2024/06/19 00:20:25
QUES: using a decibel meter, determine the sound coming from a speaker at a set volume when the meter is placed a set distance from the speaker. Relate this to the power used by the appliance making the sound. Move farther away (new d value) and compare the new volume to the original and detail what energy was changed and why.

i need a purpose. a specific proposal...SPECIFIC!!!

THANKS A LOT!!!

回答不了，帮看不懂问题的翻译一下吧。
问题：用一个分贝测试仪，放置在离扬声器指定距离的地方，测量来自扬声器的指定音量的声音。将之与制造声音的装置所用的能量联系起来。离远些，然后比较新的音量，说明什么能量产生了变化，为什么？
我需要一个目的（用途，议题？？）。一个明确的建议（提案）.
多谢！！