21000 Hz clean pure sine wave TEST TONE 21 khz frequency

21000 Hz sine tone to test your speakers or headphones.

Humans can detect sounds in a frequency range from about 18 Hz to 20 kHz. (Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high-frequency sensitivity as they mature); the upper limit in average adults is often closer to 15–17 kHz. If you “hear” frequencies lower than 18 Hz, you might just be hearing harmonic distortion.

If you can´t hear the tone in this Video, that´s normal :)

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If you have any suggestions for future videos, please let me know in the comments below :-)

▬ Test Tone Playlist ▬▬▬▬▬▬▬▬▬▬

▬ Image source ▬▬▬▬▬▬▬▬▬▬▬▬
Lizenz: CC0 Creative Commons

DISCLAIMER: Loud sounds can potentially damage your hearing. When playing one of our videos, if you feel uncomfortable, the sound may be too loud for your ears. Please do not place speakers right next to a person’s ears. If you have difficulty hearing or hear ringing in your ears, please immediately turn the volume down or discontinue listening to the sounds and consult an appropriate professional. If you have significant difficulty sleeping on a regular basis, or feel tired during the day, please consult an appropriate professional. The sounds provided by this Youtube channel are for entertainment purposes only.

Thanks for watching!

[Energy_Wizard]

I can hear this pretty well my research shows it maps to the crown.

[gertisch.]

Zum Taubenvertreiben einfach perfekt ...

[GabtheRocker]

Put the volume up and you will hear it

[olympianlegacy]

I can actually hear it no cap it's like a cricket noise but 100 times higher or like electricity's noise but also way higher.
Are my ears damaged ?

[ericj]

Cant hear it but anytime it plays I get a massive headache and earache

[augusted]

If turn the volume up and get my loud headphones only then i cna ehar it

[teamredths]

i put my ear in then i hear: *tHrEe tWo oNe*

[RCKSTLYGAMING]

Idk why but 18k-20k is very faint for me but 21k+ is loud again

[caninekathy]

I am deaf in one ear. All I am hearing is a loud high tone like a high-pitched ringing

[JazziestprsonEver]

i can hear this on 30 on my headphones

[botff]

Guys, how are you hearing this. Cant the human ear only hear sounds of upto 20 Hz to 20000 Hz

[louisahall]

Ultrasound is supposed to help with Alzheimer's, not supposed to be able to hear it though.

[theme]

1. this is as loud as regular sound even though you can't hear it and will deafen the shit out of you.

2. there is air in this audio(?)

[handlesucks]

BAM! You guys are all wrong. There's absolutely nothing