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[[Image:Lizard_ear.bmp|150px|thumb|right|'''Lizard ear''' (© RVC and its licensors, Sean Bobbit, Sue Evans, Andrew Devare and Claire Moore. All rights reserved)]]
[[Image:Lizard_ear.bmp|150px|thumb|right|'''Lizard ear''' (© RVC and its licensors, Sean Bobbit, Sue Evans, Andrew Devare and Claire Moore. All rights reserved)]]
[[Image:Lizard_tympanum.jpg|150px|thumb|right|'''Lizard tympanum (clear scale at the center)''' (Copyright © RVC and its licensors, Sean Bobbit, Sue Evans, Andrew Devare and Claire Moore. All rights reserved)]]
Most lizards seem to hear in the same range as the green iguana (500 to 4,000Hz range), with a sensitivity peak at 700 Hz, equal to about 24 dB. For lizards lacking a tympanic membrane, such as the lesser (Northern) earless lizard (''Holbrookia maculata'') and many fossorial (burrowing) and semi-fossorial lizards (for example the legless Anniella), hearing is limited to lower frequencies. However, even without a surface or subsurface-mounted tympanic membrane, many "earless" reptiles can indeed "hear", though to varying degrees.
Most lizards seem to hear in the same range as the green iguana (500 to 4,000Hz range), with a sensitivity peak at 700 Hz, equal to about 24 dB. For lizards lacking a tympanic membrane, such as the lesser (Northern) earless lizard (''Holbrookia maculata'') and many fossorial (burrowing) and semi-fossorial lizards (for example the legless Anniella), hearing is limited to lower frequencies. However, even without a surface or subsurface-mounted tympanic membrane, many "earless" reptiles can indeed "hear", though to varying degrees.