Abstract
There is currently considerable interest in developing models that more accurately predict the response of systems with small loudspeakers, such as in cellular telephones. There has also been a trend towards developing hands-free communication with cell phones, thus requiring a relatively high acoustic output from a small source. Work will be reported on the development of a model for a cell phone to help address such research issues. It has been shown that boundary layer effects can cause significant frequency shifts in the resonance peaks associated with systems having elements with dimensions on the order of the boundary layer thickness. This phenomena has been observed in the presence of ports with diameter of 1 mm and less. These effects are being investigated in a cell-phone system, and the results obtained to date will be presented.
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