41. The toucan barbet can also produce clicking sounds . 42. A spring-loaded prostate tissue biopsy needle is then inserted into the prostate, making a clicking sound . 43. This " over-center " action produces a very distinctive clicking sound and a very crisp feel. 44. There's a clicking sound and some discomfort ." 45. But the clicking sounds held his interest. 46. Their distinctive song is a single, rising whistle, which is repeated and followed by three clicking sounds . 47. It only displays its yellow back wings in flight, when it also emits a loud clicking sound . 48. The phrase was then applied to other drives exhibiting a similar unusual clicking sound usually associated with failure. 49. In the song " The Lodge ", Haughm struck the deer skull to create an unusual clicking sound . 50. The researchers found that the whales emitted a series of very short directional clicking sounds at ultrasonic frequencies.
