咝

diàn zǐ guǎn fā chū de sī sī shēng

电子管发出的咝咝声

hum of electron tubes

lú shang de shuǐ hú fā chū sī sī shēng

炉上的水壶发出咝咝声。

The kettle was whistling on the stove.

zǐ dàn sī sī de cóng tóu dǐng fēi guò

子弹咝咝地从头顶飞过。

Bullets whistled overhead.

māo gōng qǐ shēn zi chòng zhe gǒu sī sī jiào

猫弓起身子，冲着狗咝咝叫。

The cat arched its back and hissed at the dog.