[FLASH] The sounds that adult can't hear (a.k.a Mosquito Sound)

Precautions

These contain high-pitched sounds that Teenager Repellent "Mosquito" emits. Will cause discomfort in certain people. In spite whether you can or can't hear, do not play on at top volume not to damege your speakers.

Webmaster, its.

Language: Japanese English

FLASH #1; It will test how high you can hear frequently.

The sounds that adult can't hear

To start, click on the cat.

*It will truly emit high-pitched sounds.

There are differences in the limits of audibility among individuals.
Many ordinary 20's and 30's can't hear higher than 14,000Hz.
Don't worry if you can't hear. It's a kind of normal and natural aging phenomena.

♣LINKS
♦saitama_orz - There's another test, 8K to 21KHz test in WMV.
*sorry but the page that the link represents is written only in Japanese.

FLASH #2; It will test how high you can hear one by one.

Click button to test.

*Notes available at blog, written in Japanese...sorry.

Addition; It will test how low you can hear.

Click button to test.

*I have no data about low-pitched sound. Just for the interest.

Tweleve-tone scale is defined as the table below.
f = F * 2^n/12
f:frequency to calculate, F:base frequency, n:number of halftones

C C# D D# E F F# G G# A A# B
1 32.70 34.65 36.71 38.89 41.20 43.65 46.25 49.00 51.91 55.00 58.27 61.74
2 65.41 69.30 73.42 77.78 82.41 87.31 92.50 98.00 103.83 110.00 116.54 123.47
3 130.81 138.59 146.83 155.56 164.81 174.61 185.00 196.00 207.65 220.00 233.08 246.94
4 261.63 277.18 293.66 311.13 329.63 349.23 369.99 392.00 415.30 440.00 466.16 493.88
5 523.25 554.37 587.33 622.25 659.26 698.46 739.99 783.99 830.61 880.00 932.33 987.77
6 1046.50 1108.73 1174.66 1244.51 1318.51 1396.91 1479.98 1567.98 1661.22 1760.00 1864.66 1975.53
7 2093.00 2217.46 2349.32 2489.02 2637.02 2793.83 2959.96 3135.96 3322.44 3520.00 3729.31 3951.07
8 4186.01 4434.92 4698.64 4978.03 5274.04 5587.65 5919.91 6271.93 6644.88 7040.00 7458.62 7902.13
(9) 8372 8869 9397 9956 10548 11175 11839 12543 13289 14080 14917 15804
(10) 16744 17739 18794 19912 21096 22350 23679 25087 26579 28160 29834 31608
*The tone O4-A is defined as 440Hz.

♠O1C-D-E-F-G-A-B-O2C mp3

♠O2C-D-E-F-G-A-B-O3C mp3

♠O3C-D-E-F-G-A-B-O4C mp3

♠O4C-D-E-F-G-A-B-O5C mp3

♠O9C-D-E-F-G-A-B-O10C-D-E mp3

*Please play on your media player with spectrum display enabled.
You can check whether it really emits sounds.