Figure 33 Internal microphone
Internal earpiece
The internal earpiece (B1000) is located in the B-cover. The earpiece is directly driven by the internal ear
amplifiers of the PEARL_J (N2200) and no additional amplifier is needed
Figure 34 Internal earpiece
IHF speaker
The IHF speaker (B2121) is located at the bottom side of the main board. No additional amplifier is used.
External microphone
An external microphone can be connected to the device via the 3.5 mm AV connector (X2100) located at the
bottom side of the main board.
RM-721; RM-722
System Module
Page 5 – 18 COMPANY CONFIDENTIAL Issue 1
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