The distinct sound of a classic car engine starting, idling, and then accelerating away smoothly, capturing the mechanical whirring and exhaust rumble.
The distinct sound of a helicopter rotor blades spinning up, taking off, and then flying overhead, capturing the rhythmic thumping and air displacement.
The rhythmic clatter and rumble of a subway train passing through a tunnel, with subtle variations in pitch and volume as it moves.
The distant, continuous hum of an airplane flying overhead, slowly fading as it moves further away, capturing the subtle atmospheric distortion.
The distinct sound of a bicycle bell ringing clearly, followed by the gentle whirring of bicycle chains and tires on pavement.
The heavy, slow rumble of a large truck passing by, including the sound of its diesel engine and the subtle vibration of the ground.
The unique sound of a futuristic hovercraft gliding smoothly, with a low hum and subtle whooshing sounds as it moves.
The sharp, high-pitched squeal of train brakes as it approaches a station, followed by the hiss of air brakes and the gentle creaking of the carriages.
The high-pitched whine of a motorcycle accelerating rapidly, with the sound of wind rushing past and the changing engine RPMs.
The loud, deep blast of a ship's horn echoing across the water, with a slight reverberation effect.