Response delay in voice-controlled robots: the combined effect of sound propagation speed and circuit processing time

With the rapid advancement of voice recognition and artificial intelligence technologies, voice-controlled robots are increasingly utilized in human-computer interaction. However, the issue of response delay during the voice control process has become a critical bottleneck affecting user experience and system performance. This paper systematically analyzes the causes and characteristics of response delays in voice-controlled robots from two key dimensions: the speed of sound propagation in air and the internal circuit processing time of the robot. Through an examination of representative cases (such as smart speakers, surgical robots, and industrial control systems), this study reveals the relative contributions of physical and technological factors to total response time across different application scenarios and evaluates their impact on user perception and interaction efficiency. The findings indicate that in short-range scenarios, speech recognition processing is the primary bottleneck, while in long-range and high real-time scenarios, sound propagation delay also becomes a significant factor.