(zào) the chirping of birds or insects; noise; clamor; buzzing; disturbance
(zàoshēng) noise
(zàoshēngwūrǎn) noise pollution
(zàozá) a clamor; a din
(zàoyīn) rumble; noise; static (in a signal)
(zàoyīnhé) boombox; ghetto blaster