| 摘要 |
A portable assistive listening system for enhancing sound for hearing impaired individuals includes a fully functional hearing aid and a separate handheld digital signal processing (DSP) device. The focus of the present invention is directed to the handheld DSP device and a unique method of processing incoming audio signals. The DSP device includes a programmable digital signal processor, a UWB transceiver for communicating with the hearing aid and/or other wireless audio sources, an LCD display, and a user input device (keypad). The handheld device is user programmable to apply different sound enhancement algorithms for enhancing sound signals received from the hearing aid and/or other audio source. The handheld device is capable of receiving audio signals from multiple sources, and gives the user control over selection of incoming sound sources and selective enhancement of sound. In the context of being user programmable, the digital signal processing device includes a software platform that provides for the ability of the user to select, or plug-in, desired enhancement algorithms for application to selected incoming audio signals. Specifically, the invention focuses on a method of buffering an incoming audio signal, and selectively replaying the buffered audio. The method further includes converting the replayed audio signal to text for display on the handheld DSP device.
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