注目の話題: 義母の愚痴です。皆さんも聞かせてください。; 叱らない・怒らない育児の結果って; 🔥理沙の夫婦生活奮闘記😤パート2️⃣😸ﾆｬ~ﾝ

science,math and English

No.196　12/11/10 05:53
名無し0 ( 50代 ♂ ) あ+あ-

【A mike and speaker】

《A speaker changes an electric signal into an ones of sound》

Contrary to it,a speaker is an electric part which changes an electric signal into other signal of sound.😃

When the electric signal runs through the coil,a magnetic field generates in the coil.When an amount of the electricity changes,the amount of the magnetic field also changes.💡

As a result,the coil and the magnetic field draw or repel each other,and vibration generates.The vibration is conveyed to a board of vibration,🔉

The board vibrates the air,then the vibration changes into sound.🔉

As to their basic structures,the mike and speaker are same,but their functions are opposite.🎤

An earphone is a kind of the speakers,so we can use it as mike.If running electric signal into the mike,we can make a sound generate from it.🎤

However,we don't use them properly,so we can't expect their efficiencies very much,to make matters worse,the two electric instruments may be trouble,so it doesn't fit for practical use.😩