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Can you pluck the string

I made one for a physics project back in high school. The soundbox is essentially a drum, and the vibrations caused by the rubbing of the bow and the strings is what makes that drum to sound. So you would need to modify your instrument design. Flip the can around and string your erhu where it passes the bottom of the can, not the top. Then put a bridge in between the strings and the can (like a little chopped piece of a chopstick). That will make your erhu sound much much louder and more vibrant.

Sorry, absolutely not an erhu. Erhu is a two stringed Chinese bowing instrument. Er(二) means Two in Chinese language, while Hu(胡) means a barbarian in ancient China. I am an Erhu teacher so I can assure you it isn't Erhu.

Well, there are a lot of things that make this NOT an erhu! Not the least of which being that an erhu has two strings. And as another commenter pointed out, the body of the instrument, in thecase of the erhu, extends more to the rear from the plane of the strings, with not as much rise from the pole to the strings. There would be no way to play the high notes on yours with any accuracy. That being said, I just spent most of the afternoon figuring out how I would make something similar to yours out of some things I had on hand. A 28 oz peeled tomato can, a bamboo back-scratcher, a chopstick (the tuning gear, inserted into a hole in the back scratcher, which stands in the for the broomstick in yours. So mine is much smaller overall. But the chopstick friction isn't enough to hold it in place under the stress of the string pulling it, so I have to go back to the drawing board. Still, there's nothing lost in trying to make something like this, and there's much to be gained. I give you credit for trying, but... yours sounds about as good as mine does! :)

very nice work

Put rosin on the bow and it'll make a sound

The actual Erhu have string place on the opposite direction, it’s mean the bottom of the can is the front and you have put the string on the back - wrong direction. You will need a small piece of wood to make a bridge like violin’s bridge then place it n middle of bottom can then place the string on it

You should do a follow-up video, playing something with rosin on your bow.

amajing banget

Nice