I am a musician and the lightweight bamboo tuba impressed me with its resonance.
Weakened into an octagonal shape, the bamboo tube becomes a very good soundboard and sound conductor. The acoustic speaker also serves as a stand.
The mobile phone is inserted into the bamboo speaker from above, with the mobile phone in the opening. Half a piece of split bamboo is glued to the back as a backrest.
The bamboo echo chamber not only amplifies the sound, but also significantly changes the directivity, thus improving the listening quality.
*New, the bamboo stand is delivered in a gift box with a viewing window, the product is protected by wood wool.