Meanings of occasional sighs in English

The sobs diminished to sniffles, and then to occasional sighs.

The ape listened to us and occasionally threw in her own commentary, low rumbles and occasional sighs.

Both king and sheriff listened with rapt expressions; there were occasional sighs from the ladies, and grunts of approval from the men.

It sounded melancholy at that hour, and Nils, to judge from the occasional sighs with which he had accompanied it, was moved.

Mrs. Lovell was wakeful also, as was evident to her husband from her occasional sighs, sobs, and restless movements; but no words passed between them.