problems with recording with a laptop's built-in mic

Copy-pasting from an email exchange - 

Sorry, perhaps I should have asked you for a small sample recording before you recorded the whole thing. The audio quality is not great. There is something wrong either with the settings or with your hardware or both.

1. The same issue as last time, the audio sounds as if it has been recorded over a telephone line or something like that - the frequency response falls off after 5kHz, and there is nothing beyond 8kHz - 

 

You can compare that with this recording made with a Zoom H1 recorder,

 

where the frequencies up to 15 kHz and even a little beyond are clearly present.

2. Another bigger problem is that the recording has distortion due to getting clipped - the mic gain was "too hot".

 

(It turned out that the issues were due to recording using the laptop's built-in mic instead of using an Audiogram and a proper mic.)