SMALL-SIZE LOUDSPEAKER Russian patent published in 1998 - IPC

FIELD: mobile acoustic equipment. SUBSTANCE: device has housing in which low- frequency electrodynamic head which total Q-factor is in range of 0.5-1.2. In addition device has channel which has at least one ejector which is located in parallel to acoustic axis of device. Output holes of ejectors are located on at least one (front or back) side of housing. Total area of these surfaces is in range of 0.2-1.0 with respect to effective area of run-out of low-frequency head. Ratio of width of output hole of ejector to total length of output holes of all ejectors for front or back side of housing is in range of 1/2-1/50. EFFECT: increased functional capabilities. 2 cl, 1 dwg