| 主权项 |
1. A receiver apparatus comprising:
a first receiver portion, the first receiver portion having a housing with a single sound outlet and configured to convert at least one electrical signal into first sound energy having a first frequency range; a second receiver portion, the second receiver portion configured to convert the at least one electrical signal into second sound energy having a second frequency range; and an acoustic filter network, the acoustic filter network communicating with the single sound outlet and configured to receive the first sound energy, the acoustic filter network including a main branch, a first side branch, and a first chamber, the first side branch communicating with the main branch and the first chamber, the main branch having a first end and a second end and being configured to receive the first sound energy, such that all sound energy radiating from the first receiver portion including the first sound energy passes exclusively through the acoustic filter network before any of the first sound energy radiates out to an exterior environment, wherein the first receiver portion is coupled to the first end of the main branch and the second receiver portion is coupled to the main branch between the first side branch and the second end of the main branch. |
