First, click the "Normal Hearing" link above to hear a recording of a male voice reading several sentences (while this is playing, adjust your PC's volume so you can clearly understand the speaker).
Now, click the "Moderate Hearing Loss" link above to hear the same recording, but altered to sound as it would for a person with a "moderate" noise-induced hearing loss.
Background noise makes speech harder to understand. Click the "Normal Hearing With Background Noise" link above to hear the first recording again, but with a recording of a coal continuous haulage machine added to the background.
Finally, click the "Moderate Hearing Loss With Background Noise" link above to hear the same recording again (with background noise), and with a simulated "moderate" hearing loss.