Intelligibility Measurements in Wireless Voice Communication Relative to Distance, Indirect Visibility and Obstacles

Measuring the intelligibility of speech in wireless communication systems is crucial for ensuring effective and reliable information exchange in diverse environments. The goal of this article is to measure the intelligibility of speech in wireless voice communication relative to distance, obstructions, and indirect line-of-sight. The analysis is conducted using Signal-to-N oise Ratio (SNR) as a key evaluation metric. Two distinct experimental setups were employed: one with a direct line-of-sight (LOS) between the transmitter and receiver, and another with an obstructed signal path caused by a physical barrier. The findings illustrate how the presence of obstacles and increased distance significantly affect the quality and clarity of the received speech signal, with notable degradation observed in SNR values as distance increases. These results provide critical insights into the performance limitations of wireless communication systems in varied environmental conditions, highlighting the challenges in maintaining speech intelligibility in scenarios where distance or obstructions are factors.