Someone suggested that I find a sound clip of a cricket chirping and turn up the volume. I had to turn the volume all the way up to hear it, without my hearing aid. With my hearing aid on, I did not have to turn the volume completely up. The sound is so annoying! No wonder the teacher was hell bent on finding the cricket in her classroom.
Within close proximity, it is easier to hear it. But, if you expect me to find a cricket in a room, forget it.