* Sound dampening materials: Engines often use materials like insulation or baffles to reduce noise, which you could think of as their "ears" blocking out sound.
* Sensors and monitoring systems: Some engines have sensors that monitor sound levels or vibrations, which act like "ears" listening for any unusual noises that might signal a problem.
It's important to remember that these are just metaphorical uses of the term "ears". Engines are machines, and they don't have the same sensory organs as living creatures.
