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• 昭和のおとっつぁん
• 2022/11/29 (Tue) 09:31
• Report

Black flyers will be shopping and returns will be coming out from now on.
The new products will not sell, so the products will be available in outlets.

• ふと
• 2022/11/29 (Tue) 13:11
• Report

I wonder if Wireless earbuds are safe for electromagnetic waves ？
I wonder if they have any weird effects on the body since they are catching on radio waves and it is at the ear ？
Well, it is the same with cell phones, but when used for long hours, it is bad.

• 倍金万
• 2022/11/30 (Wed) 09:11
• Report

＞ I wonder if it will have any weird effects on your body since it is catching on radio waves and it is at your ear ？

Wireless Earbuds are themselves receivers, so they do not emit radio waves like transmitters do.

If you are that concerned, then hearing aids left on would also be harmful.

• 倍金万
• 2022/12/01 (Thu) 09:36
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＞ Noise cancellation is not possible without earphone music or sound

As usual, this guy is talking nonsense.

As I said before, noise that comes in repeatedly at a certain level and frequency, like the noise from airplanes and cars, is electronically cancelled in the circuitry, allowing only music and voice to pass through.

Mr. Semantics, please understand a little more science. Let's not cannibalize each other, old man.

• 倍金万
• 2022/12/02 (Fri) 09:41
• Report

I'm an electrician at heart, so again I'm going to sprinkle in some extra knowledge.


＞ Without music, the sound that cannot be prevented only by the noise cancellation function is "talking at close range"

↑ The response of
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Music and human singing cannot be turned off by noise cancellation circuitry because the same frequency and volume will not repeat twice with human speech regardless of distance. However, the structure of the earphone itself acts as a buffer for voices emitted outside of the earpiece and noises that do not repeat in frequency, so they do not enter the ear with any great efficiency.

In contrast, engine noise and wind noise in an airplane can be muffled by electronic circuits that reverse the phase and re-mix them, since they are always the same in frequency and volume. The principle is that the [+1] frequency ・ and the [-1] volume and phase inverted [-1] are mixed at exactly the same time to [0].