| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent propagation of electromagnetic waves from a radio circuit to a loudspeaker in portable radio equipment such as a portable telephone, etc., and to improve the sound quality of the loudspeaker. SOLUTION: This portable radio equipment has a radio circuit 9, a loudspeaker 8, and a shield case 10 provided to cover the radio circuit 9. A venthole 10A having such a size that does not affect the shielding of the shield case 10 is made through the case 10 near the back face of the loudspeaker 8.</p> |
