She felt very uncomfortable when passing the construction site due to the workers' catcalls.

catcalls 是名词，由 cat（猫）和 call（叫声）组成，原指像猫叫一样尖锐刺耳的声音，引申为"起哄、口哨声"，特指带有骚扰性质的吹口哨或喊叫行为。