![\"frog_in_hand2\"](\"http:\/\/pages.vassar.edu\/sensoryecology\/files\/2014\/08\/frog_in_hand2-300x225.jpg\")
The Gall Lab, in collaboration with Walt Wilczynski at Georgia State University has just published a paper entitled “Hearing conspecific vocal signals alters peripheral auditory sensitivity”. \u00a0But, what does that mean?<\/p>\nThe Gall Lab, in collaboration with Walt Wilczynski at Georgia State University has just published a paper entitled “Hearing conspecific vocal signals alters peripheral auditory sensitivity”. \u00a0But, what does that mean?<\/p>\n
Well, many animals (including humans) are exposed to the vocalizations of conspecifics (individuals of the same species) over long periods of time. \u00a0We have known for a long time that if you hear the same thing over and over you will habituate to that sound. \u00a0That means you’ll stop paying attention to sounds that don’t give you\u00a0new information. \u00a0This is why moms\u00a0are surprisingly good at tuning out shoutings of “Mom . . . mom . . . mom. . . mom”. \u00a0What has been less clear, however, is what happens to your auditory system when you are exposed to lots of different sounds, especially when we are talking about peripheral auditory structures like the ear and auditory nerve (the nerve that runs from the ear to the brain).<\/p>\n
![\"One](\"http:\/\/pages.vassar.edu\/sensoryecology\/files\/2014\/08\/frog_in_chamber.jpg\")
<\/a>One of our frogs, enjoying a sound chamber.<\/p><\/div>\n
We decided to explore this idea in the green treefrog. \u00a0Treefrogs are adorable little guys that form leks. \u00a0Leks are large assemblages (usually near ponds) where males call and call and call in an effort to attract a mate. \u00a0This can go on for weeks, so individuals in the area will hear lots of different males call over a long period of time. \u00a0We replicated this in the lab by housing frogs in acoustically-isolated chambers and playing the sound of a frog chorus to half of the frogs. As a control, we played random tones to the other half of the frogs.<\/p>\n
<\/a>Inside the hearing testing booth. The animal is placed in the faraday cage below the speaker.<\/p><\/div>\n
We tested the hearing of the animals before and after they were exposed to these sounds. \u00a0We found that animals that had listened to the chorus for ten days had improved hearing, while animals that had listened to the tones didn’t change much. \u00a0This suggests to us that the auditory system – even at the level of the ear! – is able to change over a short period of time. \u00a0More importantly, the social stimuli that an animal is exposed to during its lifetime are very important in shaping its future auditory processing abilities. \u00a0This is the first time that this has been shown in an adult animal. \u00a0To find out more, check out our article!<\/p>\n
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The Gall Lab, in collaboration with Walt Wilczynski at Georgia State University has just published a paper entitled “Hearing conspecific vocal signals alters peripheral auditory sensitivity”. \u00a0But, what does that mean? Well, many animals (including humans) are exposed to the … Continue reading