Description     Claims     Drawing  

US7970148B1   [0015] 

Electroacoustic absorbers for the low-frequency modal equalization of a room: what is the optimal target impedance for maximum modal damping, depending on the total area of absorbers?   [0065] 
Implementation and non-intrusive characterization of a hybrid active-passive liner with grazing flow   [0065] 
The use of negative source impedance with moving coil loudspeaker drive units: an analysis and review   [0065]