Actually, I can see where some would like to compare singing and trumpet playing, and if we are careful, it can be meaningful. The basic wide band noise for speech/singing is created by the vocal chords, for trumpet playing by the lip vibration on the mouthpiece. The vocal chords are two "ribbons" of muscle and thus can respond VERY quickly to changes in tension. The lips are just tissue and have to be manipulated by auxiliary muscles in a relatively unnatural way. Breathing can be very similar BUT while the vocal chords are not in the way for speech or singing, they can screw up/modulate our airflow. Articulation occurs AFTER the sound production by the vocal chords, but BEFORE the sound production by the lips. Intelligibility occurs when speech/song is modulated by our bodies, mouth and tongue. This also happens with the trumpet but to a slightly lesser degree. There is also some controversy about modulating the resonance in our mouths while playing. This seems to be a technique used on the digiridoo and advocated by some brass players. In any case, this would happen BEFORE tone is produced. So, in any case, there is only a limited amount of mechanical stuff to compare, but a world of spiritual/inspirational things to share. A fine soprano can be a model for our trumpet playing.