No, it is not possible to make your voice sound like someone else's without using any type of audio effects or distortion. The sound of a person's voice is influenced by various factors such as vocal cord structure, size, and tension, as well as their unique physiology. These factors contribute to the individuality and distinctiveness of each person's voice.
While there are techniques like mimicry and impersonation that people can use to imitate the speech patterns, tone, and accent of others, these techniques still involve manipulating their own voice to some extent. Even skilled impersonators rely on vocal techniques, such as pitch modulation, intonation, and articulation, to mimic the voice of another person.
To achieve a convincing imitation or mimicry of someone else's voice, audio effects or distortion techniques are typically employed. These effects can include pitch shifting, equalization, modulation, and other processing methods that alter the characteristics of the voice recording.
Without using any audio effects or distortion, it would be challenging to mimic someone else's voice accurately or make your voice sound exactly like someone else's.