The audio, "Strange Nonsense," features the voice of a woman speaking and talking in English. Her voice, laden with various intonations, gives an impression of a female narrating or possibly having a conversation. However, the content of her speech is rather peculiar as it revolves around random, unrelated topics, making it sound like sheer 'blah' or nonsense. Despite the lack of coherence in her speech, her voice carries a compelling quality that keeps you engaged. Overall, it's a unique blend of a fluent English-speaking woman talking continuously, yet what she speaks seems to be nonsensical or strange.