共 6 条
[1]
BRUEL PV, 11962 BRUEL KJAER TE
[2]
BRUEL PV, 41961 BRUEL KJAER TE
[4]
ITHELL AH, 1965, ACUSTICA, V15, P109
[5]
SHAE EAG, 1962, J ACOUST SOC AM, V34, P1233
[6]
STEVENS SS, 1946, Patent No. 2408490