Beam Reach

Tim Hunt helps measure lightbulb sounds

Today on land I performed an experiment in order to measure the attenuation of a light bulb breaking under water. At the FHL dock a lined up the array with the CRT in place of hydrophone D. At the other end of the dock I lowered a light bulb about 4.8 m in depth 35m away from the CRT, and 75 away from Hydrophone A, etc, and dropped a weight on the bulb to make it break. I recorded two files, one with our class gain settings, and the second with the gain settings as low as the sound devices allowed me to put them, because I could hear the light bulb breaking under water and I imagined the sound would clip on the recording devices. Tim Hunt helped me out setting up the experiment and gave me some advice.