@Rushyyid hello, try to access the Notifications folder. Open the app My files / Internal memory / Notifications, there you can find the notification audio files and delete them. Greetings.
"The quieter you become-the more you are able to hear..."
Hi, as long as you have Yahoo installed or an active Yahoo account on your device, you can't delete the notifications sounds they'll end up reappearing after you delete them.
