Patent ID: 7298858

Claim:
An insert earphone comprising: a housing; a receiver located in the housing and having an output port, the receiver for electrically coupling with an audio signal source; a flexible eartip for acoustic sealing with an ear canal of a user, the flexible eartip having a foam eartip portion and a flexible tube portion; and a tube nipple providing an acoustic pathway through at least one wall of the housing and having a first end and a second end, the first end of the tube nipple being located within the housing and being acoustically coupled to the output port of the receiver and the second end of the tube nipple being located externally to the housing and being acoustically coupled to the flexible tube portion of the flexible eartip, wherein the earphone providing a response that is approximately 0 dB relative to a response of the TDH-39 standard at one or both of 6 kHz and 8 kHz.