What aspect of a rotary compressor contributes to its quieter operation compared to other compressors?

The aspect of a rotary compressor that contributes to its quieter operation compared to other compressors is indeed related to its design and the number of moving parts. Rotary compressors typically have fewer moving parts than reciprocating compressors, which utilize pistons that create more vibration and noise during their operation.

With fewer moving parts, there is less mechanical interaction that can cause noise, leading to a smoother and quieter performance. The rotary mechanism, which often involves the movement of a rotor within a cylinder, minimizes the abrupt movements of components that are characteristic of more traditional piston-based compressors. This streamlined design results in reduced operational noise, making rotary compressors a preferable choice in applications where noise levels are a concern.

The other options may contribute to the overall functionality or efficiency of compressors but do not directly relate to the reduction of noise during operation as effectively as the reduction in the number of moving parts does. The insulated housing can help reduce noise transmission but does not address the noise generated by the compressor mechanics themselves. Rotating eccentric weights and hermetic sealing also play roles in performance but are not primarily focused on noise reduction.