https://www.google.com/search?q=%E5%85%A5%E3%82%8A%E6%B1%9F&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiF3aGP4YnjAhVAwIsBHSFZBIoQ_AUIECgB&biw=1453&bih=929

https://skylum.com/noiseless

https://kotobank.jp/word/%E6%B1%9F-442792