Katydids Crickets Nature Sounds. Katydids Crickets: Katydids, or bush crickets or long-horned grasshoppers, are related to crickets. The two groups combine to produce a steady chorus of high and upper-mid-range sounds. The singing is frquently used as a masking sound for ringing in the ears. These insects are are in the foreground, midground and background at different sound levels.