Philippe Nguyen, Sharan Banagiri,  Robert Schofield

We made acoustic, magnetic, shaker and impulse injections in the LVEA today, mainly while LLO was down for inclement weather. Im not sure how it couples, but we traced the 115 Hz magnetic coupling resonance to HAM3. We saw some shaker coupling at the manifold reduction flange near the ITMY optical levers, and when we shook the BSC2 walls. We did not see shaker coupling at either of the gate valves that we tested. Impulse injections showed strongest coupling at HAM5/6, supporting shaker measurements.