"可听声信号" can be translated into English as "audible acoustic signal" or "audible sound signal".
"Audible" means capable of being heard.
"Acoustic" relates to sound or the science of sound.
"Sound signal" is a more general term for a signal that carries information through sound.
Both translations are accurate, but "audible acoustic signal" might be more precise in a technical or scientific context, emphasizing the acoustic (sound-related) nature of the signal. "Audible sound signal" is also correct and more straightforward in everyday usage.