4 sentences

1. 树上的乌鸦发出哑哑的叫声。

   shù​shàng de wū​yā fā​chū yā yā de jiào​shēng.

   The crows in the tree were cawing.

   Source: Dong Chinese Dictionary

2. 他的嗓子由于感冒而变哑了。

   tā de sǎng​zi yóu​yú gǎn​mào ér biàn yǎ le.

   His voice went hoarse because of a cold.

   Source: Dong Chinese Dictionary

3. 这枚炮弹落地后没响，原来是个哑的。

   zhè méi pào​dàn luò​dì hòu méi xiǎng, yuán​lái shì gè yǎ de.

   This shell didn't go off after landing; it turned out to be a dud.

   Source: Dong Chinese Dictionary

4. 因为那次事故，他不但聋了，而且哑了。

   yīn​wèi nà cì shì​gù, tā bù​dàn lóng le, ér​qiě yǎ le.

   Because of that accident, he was not only deaf but also mute.

   Source: Dong Chinese Dictionary