Movement produces all sounds.
When a diaphragm (membrane) or an object move at sufficient speed back and forth, then this will cause the pressure in the air to start decreasing and increasing. These pressure-shifts (commonly known as sound pressure waves) is interpreted by our ears as sound.
Pressure-shifts move in the air like ripples/waves in the water when you throw in a pebble.
vocal cord
All these actions produce waves. Musical instruments produce sounds waves in air. Dropping a pebble in water produces waves on the surface of the water.
Destructive Interference
A Geiger meter satisfies those requirements.
air waves.
your larynx or (voicebox)
whale, dolphin
it is the voice box. it produces sounds.
carillon
It is likely that a large, well made pipe organ produces the lowest sounds, at least among the acoustic instruments. Electronically you can produces sounds of arbitrarily low pitch.
No actually the bass drum produces low-pitched sounds.
vocal cord
carillon
wala
Perhaps you mean monotone, something which produces sounds which do not vary in pitch.
A Metronome.
Words with 'gh' and 'kn' sounds are known as consonant clusters. The combination of 'gh' produces sounds like /f/ in words like "enough" or /g/ in words like "ghost." The 'kn' cluster typically produces the /n/ sound in words like "knight" or "knit."