RECEIVER ACOUSTIC LOW PASS FILTER

摘要

A receiver apparatus includes a first receiver portion and an acoustic filter network. The first receiver portion has a housing and is configured to convert at least one electrical signal into first sound energy having a first frequency range. The acoustic filter network communicates with the first receiver portion and is configured to receive the first sound energy. The acoustic filter network includes at least one sound channel and at least one chamber that communicates with the at least one sound channel. The least one sound channel includes a main branch and a first side branch and the at least one chamber comprises a first chamber. The first side branch communicates with the main branch and the first chamber, and the main branch is configured to receive the first sound energy.