1. SOLID-WALLED WIND TUNNEL rigure 3. Test configuration for the 1982 Lockheed
2. Sound Measurement Location Selection - The 1982 Lockheed data shown in Figure 1 were acquired at B fixed excitation voltage, but varying excitation frequency. Similar data were acquired in this test series, initially for the .7-inch airfoil mounted in the solid-walled wind tunnel.
3. 90 100 110 120 130 140 150 EXCITATION LEVEL(dB.REL. 2x10-5Nim 2)