Using a special device that visualizes fine substances of a few microns (1/1000 millimeter), we verified the droplets when playing the recorder and blowing off the water inside.
Although it is difficult to decide the details of visible substances, we think that the substances that fly in a straight line will be droplets and the ones that fly upward will be dust.

Almost no splashes could be seen in the performance However, when there is a gap between the mouth and the recorder, the splash may fly. (movie 5 &16)

Based on the results of this experiment, we plan to release a recorder performance and maintenance method that is expected to be effective in preventing infectious diseases.

Almost no splashes could be seen in the performance However, when there is a gap between the mouth and the recorder, the splash may fly. (movie 5 &16)

Based on the results of this experiment, we recommend the recorder performance and maintenance method as below that is expected to be effective in preventing infectious diseases.

　

Shooting by Shin Nihon Air Conditioning Co., Ltd.

Confirmation of splashes (without recorders)

1.Partial singing of "Grandfather's Clock" (Japanese)

*splashes with some sounds

2.Voiced tonguing 'Tu'　　　　　　　　　　　　　　 　3.Unvoiced tonguing 'Tu'

*splashes　　　　　　　　　　　　　　　　　　　　　*splashes (less than by voiced tonguing)

Soprano Recorder

4. Play with finger holes open　　　　　　　　　　　　5. Play the music with B sound

　　　　　　　　　　　　　　　　　　　　　　　　　*splashes (in case of gap around mouthpeice)

6. Repeat the scale for one minute　　　　　　　　 　7. Play music with a strong breath

8. Windway drainage (attached with the finger)　　　　9. Windway drainage (wrapped with cloth)

*First check for splashes, second check for quite a bit　 *First check for a little splashes

Alto Recorder

10. Play with finger holes open　　　　　　　　　　　11. Play the music with a low B sound

12. Play the music with high B sound by thumbing　　13. Repeated the scale for one minute

14. Windway drainage (attached with the finger)　　　15. Windway drainage (wrapped with cloth)

*First check for a little splashes

Tenor Recorder

16. Repeated the scale for one minute

*splashes (in case of gap around mouthpeice)

Bass Recorder

17. Play the scale

Comparative test

18.Perform with oil mist in mouth (to check the air flow)

*Oil mist is the air that contains olive oil, and you can see the movement of the air.

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