Spectrogram Comparisons

When recording "the butter spilled on the cot," I first recorded myself in a normal speaking voice, and then put on a Southern accent for the second recording. Here are the observations I made when comparing the two resulting spectrograms (I'm going to refer to the two as "normal" and "southern"):

• In normal, my individual words were more pronounced from the silence in between them; each word was given a more or less even weight, and the words were distinct and separate on the spectrogram.
• In contrast, in southern the non-e vowels were a lot longer and more emphasized - "the" and the second syllable of "butter" were a lot softer and shorter than the syllables "bUtt-," "spIlled," "cOt," and to a lesser degree "On."
• Singling out the word "butter": in normal the two syllables had about even amplitude, and the second syllable was a bit longer; in southern the first syllable had a lot larger amplitude and was quite a bit longer than the second.
• In normal in the phrase "spilled on the cot," each word was distinct with an even level of noise between each that constituted the silence; the puff of air produced at the end of "cot" as the "t" produced waves not present in southern; and there was a definite break between "spilled" and "on," with a wave group for the letter "d."
• In southern in the phrase "spilled on the cot," the vowels of the entire phrase sort of ran into each other, with no apparent pauses in between words; there were no waves for the sounds "d" and "t" produced at the ends of "spilled" and "cot."
• When I zoned in on just the "o" sound of "cot" in both spectrograms, I noticed that there was fluctuation in southern with the amplitude sustaining itself, then dropping briefly, and rising again all within the vowel, whereas the vowel in normal held an even amplitude.