What type of graph is best for displaying different speech sounds?

Question

Python

Visual interface for speech correction

There was a desire to analyze the situation when the Google speech recognition application sometimes incorrectly indicates the word spoken to me. Therefore, I chose the Spectrus program in order to distribute sounds according to different types.

As a result, a significant difference was found in the pronunciation of sounds between me and the person with the correct pronunciation. There is ONE problem - it is difficult to make out the different meanings and it is difficult to determine the quality of the sounds.
Question: "Which type of graph is best for displaying various speech sounds?"

Answer 1

Spectrogram