The phonetic-acoustic interface is crucial in the forensic domain, yet its study and practical application have been relatively underexplored. Its significance stems from the ability to analyze vocal characteristics within legal contexts, providing valuable insights for tasks such as speaker identification, voice authentication and the assessment of message quality. This interface also studies how voice features are transmitted across various settings, contributing to a deeper understanding of the clarity of communicative exchanges. In this regard, this study seeks to emphasize the critical role of mobile devices in determining speech intelligibility. Specifically, it aims to analyze how different devices, including prominent brands such as iPhone, Xiaomi, Samsung and Motorola, affect the clarity of oral messages. The underlying motivation of this research is to identify which brands enhance speech intelligibility and which hinder it, thereby influencing the effectiveness of communication in mobile phone interactions. To achieve this, ArtemiS SUITE software will be used, a specialized tool for the objective analysis of speech intelligibility. The findings from this analysis will provide valuable insights into the relationship between mobile technology and speech perception, contributing to the development of more effective communication tools.