Long Description: Image of dual channel recording. The top wave form is of noise alone, and looks like a solid horizontal bar. The bottom wave form is of speech plus noise, and looks like zig-zag lines of varying heights overlaid on a solid horizontal bar.

Noise Alone (N) Avg. RMS Power -27 dB

Noise + Speech (S+N) Avg. RMS Power -21 dB

Output of a hearing aid on telecoil coupled directly to a digital cell phone

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