Influence of the interaural canal on sound localization
In birds the skull has a connection from left to right, the interaural canal, through which sound may travel between the two ears and reach both sides of the ear drum. This creates a pressure gradient receiver. While small birds have such pressure difference receivers, current evidence suggests that in the barn owl the attenuation from the left to the right ear (and vice versa) is higher than 40 dB for frequencies above 4 kHz. The situation for lower frequencies remains unclear. Therefore, we teamed up with Jakob-Christian Dalsgaard and Ole Larsen from Odense University (Denmark) to use laser vibrometry to study ear drum motion in barn owls (Figure). At this moment data are collected and analyzed.
Most recent funding
DFG grant Wa606/24-1