Otomi-sen is an application that uses acoustic psychological effects (masking effects) instead of the noise canceller function to reduce annoying ambient sounds.

Effective when "I can't concentrate on work, study, programming, etc." due to "too quiet and uncomfortable", "I can't help but worry about ambient sounds", "I'm worried about specific noise or conversation next door", etc. there is.
However, there are individual differences in the usage environment and whether or not the sound earphones work well. If you are concerned about the playback sound of the app, please refrain from using it.

The specific sound to play can be selected from "Radio noise", "Forest rain sound", "Cafe sound", "Night sea", "Early morning", "Library", "Moon viewing", and "Wind chime".
The timer playback time can be specified from "3 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour", and the time until the end of playback can be confirmed with the countdown timer on the screen. increase.
Adjust the volume level with the volume button on the main unit.

This app works with the speakers of the main unit, but the effect is clearer with stereo earphones and stereo headphones.
Also, pay attention to the volume level so that loud noises do not hurt your ears.