| 摘要 |
Acoustic leakage between a sound diffusion region of a mobile telephone, opposite a loudspeaker, and another region of the casing, open to the open air, solves the problem of overamplification of low frequencies when the casing is pressed against the listener's ear. The gain in the pass-band is modified in an expected direction only when the user presses the mobile telephone against his or her ear for private listening.
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