Don don (ドンドン) is the sound that the drum makes in onomatopoeic form.
In the picture below Yotsuba attends a matsuri (Japanese festival) and the sound the drum makes is written in katakana as ドンドン (don don)
Don don (ドンドン) is the sound that the drum makes in onomatopoeic form.
In the picture below Yotsuba attends a matsuri (Japanese festival) and the sound the drum makes is written in katakana as ドンドン (don don)