Here are two more diagrams of the speech banana.
The speech banana is the term used to depict where the majority of speech sounds occur. The numbers across the top are the frequencies or pitch (low to high) of sounds. The numbers across the left side represent the intensity or loudness of sounds. Within the gray (the first diagram) or the yellow (the second diagram) area, speech sounds are charted to show their pitch and loudness when produced. To give you an idea of how loud, low or high normal sounds are, the illustrations and photographs illustrate various environmental and human sounds when produced, such as wind (i.e., the leaves), the tick tock of clocks/watches, water dripping, whispering, normal speech, baby crying, rock bands, jackhammers, and gun shots. The second diagram has the degrees of hearing loss labeled on its right side. Most sensori-neural (i.e., originating in the inner ear) hearing losses have a combination of degrees, with the most common being a sloping loss with greater severity in the high frequencies from 2000 to 8000 Hz.