Unfortunately, it is difficult to achieve smaller dipole spacing in acoustic systems that require larger acoustic drivers. Variable effective dipole length of loudspeakers can accomplish a greater dipole spacing at lower frequencies, and a smaller dipole spacing at higher frequencies. Loudspeakers can be effective off-ear headphones, particularly loudspeakers having a variable effective dipole length. Spillage can detract from the usefulness and desirability of off-ear headphones. This disclosure relates to acoustic transducers.Īcoustic transducers of off-ear headphones are located farther from the ear and do not confine sound to the just the ear, and thus off-ear headphones produce more sound spillage that can be heard by others, as compared to on-ear headphones.
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