Specifications
Specifications were determined from background research, existing solutions, and the client’s requirements. The device must be portable, be usable for at least 90 minutes, and fulfill the technical requirements for auditory training signal output. The human hearing range is sensitive to frequencies between 20Hz-20 kHz. Ambient noise is anticipated to range up to 75 dB, and the client requires a signal-to-noise ratio from -15 to 30 dB. The sound of face-to-face, conversational speech was measured to be about 50-60 dB.