Glossary beginning with H

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The ability of organism to sense sound.

"An insect will be said to hear when it is demonstrably responsive to sound." [1]

"...the only distinction made between hearing and the tactile senses is based on the intensity factor and is quite arbitrary. Atthepresenttimenoconfusionarisesinpracticebecausethesensitivity of the auditory organs so far investigated is of a different order from the sensitivity of end-organs usually regarded as tactile. But the distinction is not fundamental, and it can be regarded as certain that further work will demonstrate the existence of end-organs intermediate in sensitivity between “hearing” and “tactile” end-organs. There will then be no justification for attempting a sharp separation." [1]


  1. Pumphrey RJ. Hearing in Insects. Biological Reviews. 1940;15(1):107 - 132. Available at:
The sound produced by a to- OR fro- movement of the stridulatory apparatus. Broughton (1963) took the view that this term should only apply to either of the components of a diplosyllable, preferring the term haplosyllable for syllables where either the to or fro motion was silent. Later authors (e.g. Ragge & Reynolds, 1998) often replace haplosyllable with hemisyllable.

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith