Simple drawing of trumpet

Step one:

First draw an ellipse.

Step 2:

Draw two diagonal lines below the oval and connect them with arcs.

Step 3:

Draw two more arcs outwards and connect them with arcs as well.

Step 4:

At the bell mouth, draw a little thickness, and then draw a trapezoid and oval structure inside.

Step 5:

Then draw a handle for the horn, and use small short lines on the outside to create the feeling of sound waves.

Step Six:

Finally, just paint the painted horn with a beautiful color.