Patent ID: 7352859

Claim:
A telephony earpiece device comprising: a speaker diaphragm; a rear cap disposed on a rear side of said speaker diaphragm to provide a cavity between said rear cap and said speaker diaphragm, said cavity having dimensions selected to constrain a 00 vibration mode of said speaker diaphragm such that a 00 vibration mode dominates, said rear cap having a slow leak located adjacent a diaphragm nodal line of said 00 vibration mode for damping a first resonance peak and a rear resonator for building a low end frequency response, said rear resonator having a plurality of rear holes in said rear cap located intermediate of said low leak and a centre area of said rear cap proximal a diaphragm nodal line of said 00 vibration mode; and a front resonator including a plurality of front holes and a front cavity, said plurality of front holes optimally positioned for enhancing high frequency end response, said front resonator including a leak for adjusting low frequency end response amplitude.