1. I could hear the constant hum of distant traffic.

2. He began to hum along with the music.

3. The hum of the tyres on the road lulled her to sleep.

4. The air of the ball began to hum.

5. The room filled with the hum of conversation.

6. Things are starting to hum with activity.

7. Hum the opening bars of your favourite tune.

8. Ho hum, another nice job down the drain.

9. The streets were beginning to hum with life.

10. In the background was that eternal hum.

11. Things were beginning to hum.

12. The new manager soon made things hum.

13. The place is really beginning to hum.

14. He began to hum, somewhat tunelessly.

15. He began to hum a tune.

16. There's an annoying hum on this computer.

17. The hissing sound gradually changed into a low hum.

18. No one can hum him to draw his attention.

19. They began to hum with activities after Christmastide.

20. They began to hum when seeing Jackson walk into the hall.

21. Before he knew it, the heat and hum of the forest had lulled him to sleep.

22. We hear the hum of conversation from the next room.

23. Hum the opening bars of your favourite piece of music.

24. Hum, I am sorry but I thought you were French.

25. Soft, now what be this hum?Sentencedict.com

26. There was a low hum of conversation.

27. He started to hum through his nose.

28. I put my pyjamas on and hum to myself.

29. I don't know the words of the song but I can hum it to you.

30. I've forgotten how that tune goes - could you hum it for me?