NotchedSingle tone
12,000 Hz tone
12,000 Hz is close to the note F#9 (A4 = 440 Hz), in the range of a very thin, airy shimmer near the top of what headphones play. People who hear a tonal ringing often compare their sound with tones like this.
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Is your sound higher or lower? Play a neighbour, then go back to 12,000 Hz.
Pitches an octave apart sound alike, so people often land exactly one octave off. How pitch matching works
About this pitch
12,000 Hz sits about 23 cents above F#9, which is 11,840 Hz. The nearest piano key with the same note name is F#7 (2,960 Hz), two octaves lower. One octave down from this tone is 6,000 Hz. It is about 1.5 octaves above C8 (4,186 Hz), the top key on a piano. Many people hear this pitch only faintly or not at all, and many small speakers barely play it. If you hear nothing, that is common. Don't turn the volume up to chase it.
Not sure this is your pitch?
A guided match sets levels for your ears, checks the octave and gives you a range. It takes about four minutes.
Notched is a Mac app that filters a one-octave band at a pitch you set out of what your Mac plays.