To sign trumpet, bring both hands up near your mouth as if you are holding a real trumpet. Form both hands into 'C' shapes, with your non-dominant hand closer to your mouth and your dominant hand further out. Wiggle the fingers of your dominant hand up and down, mimicking the action of pressing the valves on a trumpet.
Point to yourself, sign 'play', and then sign 'trumpet' by holding your hands up to your mouth and wiggling your fingers.
Sign 'trumpet', then sign 'music', and finish with the sign for 'loud' by pointing to your ear and shaking your fists downward.
Point to the person, sign 'learn', and then finish with the sign for 'trumpet' to show what instrument she is practicing.
Point to yourself, sign 'play', and then sign 'trumpet' by holding your hands up to your mouth and wiggling your fingers.
Sign 'trumpet', then sign 'music', and finish with the sign for 'loud' by pointing to your ear and shaking your fists downward.
Point to the person, sign 'learn', and then finish with the sign for 'trumpet' to show what instrument she is practicing.
While not strictly required, many signers naturally puff their cheeks slightly or purse their lips to mimic blowing into the mouthpiece. This adds a great non-manual marker to make your signing more expressive.
Typically, your non-dominant hand stays closer to your mouth to support the 'instrument,' while your dominant hand extends further out to press the valves.
Yes, this sign is often used generally for brass instruments with valves, like a horn or a cornet. The context of your sentence will usually make it clear that you mean a trumpet.
