The sound of something that hums; a hum.
Making a hum sound.
A wavering sound produced by means of a movable mute or by electronic means
to make a wah-wah sound
The sad trombone sound, used to indicate failure or disappointment. May be used mockingly; also written wah wah and womp womp.
Modifying the resonance of musical notes to produce the effect of a human voice.