We have two large anechoic rooms illuminated by dim long wavelength light that are used for behavioral experiments. One room is equipped with two high speed digital cameras to record the flight path of the bats and two ultrasound-sensitive microphones on the floor to record vocalizations of the bat. The whole system is operated by a common trigger so that the audio and video are automatically synchronized. Simultaneously, an array of 24 microphones records the sonar beam pattern produced by the bat. 20 microphones were arranged in a horizontal rectangle shape around the room to extract the horizontal aspect of the sonar beam. The remaining 4 microphones are arranged vertically on one wall of the room.
This booth is used for extracellular recordings. It contains a vibration isolation table, Zeiss microscope, a custom stereotaxic holder and a TDT system for data acquisition. Sound stimuli are broadcast through an array of speakers located in a semicircle in front of the bat. Custom software is used to run experiments.
Neurophysiology from Behaving Animals
A Neuralynx system is used for recording neural activity from freely behaving animals, using either a tether or custom wireless radio telemetry.
There are two anechoic booths. One is used for psychoacoustic experiments and the other is used for neurophysiology.
Animal Housing Room
The lab has three bat colony rooms with light, temperature and humidity control for different bat species.
A large calibrated frame with a mounted adjustable speaker is used for head-related transfer function (HRTF) measurements.