Abstract
A hearing aid having two physically separate receivers, one for outputting low frequency (LF) acoustic sounds and another for outputting high frequency (HF) acoustic sounds. The LF receiver's output port is connected to a tube in which the HF receiver is inserted. The LF acoustic sounds either flow around the HF receiver, which include standoffs to space the HF receiver away from the inner tube wall, or through a channel in the HF receiver. At the output of the HF receiver, the LF and HF acoustic sounds are combined to form an acoustic signal that is transmitted to the ear canal. The LF receiver can be optimized for compliance, distortion, resonance frequency, and output. Its orientation is selected for reducing the overall size of the hearing aid. The HF receiver is smaller and placed far away from any microphone(s), reducing feedback effects, and may have a cylindrical or rectangular shape.
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