n.高（大）声；响度，音量

The loudness of the music made it difficult to hold a conversation.
音乐的声音太大，以至于很难进行交谈。
Adjust the volume control to increase or decrease the loudness of the sound.
调节音量控制器来增大或减小声音的响度。
The siren's loudness startled everyone in the vicinity.
警笛的巨大声响吓到了附近的所有人。
The baby fell asleep despite the loudness of the construction noise outside.
尽管外面施工噪音很大，但婴儿还是睡着了。
The speaker's voice lacked modulation, maintaining a constant loudness throughout their speech.
演讲者的声音缺乏抑扬顿挫，整篇演讲中音量一直保持不变。
The dog barked with an increasing loudness as the mailman approached.
当邮递员走近时，狗的叫声越来越大。
The fireworks' loudness echoed across the valley for several minutes.
烟火的巨大声响在山谷里回荡了好几分钟。
She adjusted her headphones to a comfortable loudness before starting the movie.
她在开始看电影前调整耳机至舒适的音量。
The loudness of the thunderclap made the windows rattle.
那声惊雷之大，甚至使窗户都震动起来。
The teacher asked the students to lower the loudness of their voices during the library visit.
老师要求学生们在参观图书馆期间降低说话声音。