The audio begins with a distant, soft humming, a sound characterized by the rhythmic churning of a propeller airplane. Gradually, the humming grows louder and more distinct, evoking the image of a classic aircraft slicing through the sky. The whirling sounds of the propeller, similar to a large fan, become increasingly audible, creating a captivating blend of mechanical and natural sounds. As the airplane grows closer, the intensity of the sound amplifies, fostering a sense of anticipation. The noise of the propeller reaches a crescendo, overwhelming the audio space as the airplane appears to fly directly overhead. The distinct chopping sound of the propeller blades cutting through the air is clearly discernible, creating a powerful, rhythmic pattern. Gradually, the intense noise begins to recede, mimicking the plane's overhead passage and subsequent distancing. The propeller sound, once overpowering, slowly dwindles, leaving behind a soft echo that gradually fades into silence. The