Paging receiver with resonant box
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United States of America Patent
Stats
-
Nov 9, 1993
Grant Date -
N/A
app pub date -
Nov 20, 1991
filing date -
Nov 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A paging receiver provided with a speaker unit including a first resonant box and a second resonant box in order to produce a higher sound pressure without however enlarging a casing of the receiver body is disclosed. The second resonant box is formed made in a hollow space of a mold for fixing a holder to the casing of the paging receiver and is provided with slits to resonate in response to the sound wave outputted from the first resonant box at either input or output portion of the sound wave.
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Family
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