Silence on the Road: Acoustic Engineering in PREETO Mid-Drive Motors

For many riders, noise is an invisible source of fatigue. A constant mechanical hum or gear whine not only disrupts the riding experience but also signals inefficiency in the drivetrain. PREETO treats acoustic optimization as a key performance indicator, borrowing principles from the automotive NVH (Noise, Vibration, Harshness) domain.

At the core is PREETO’s gear noise control strategy:

• The motor uses helical gears with optimized tooth profiles, reducing meshing impact and lowering transmission noise.
• Advanced surface finishing techniques minimize roughness, ensuring smoother contact between gear teeth.
• Dynamic balancing of the rotor suppresses vibration, preventing resonance at high speeds.
• Materials are carefully selected for both strength and damping properties, mitigating sound propagation.

These engineering efforts result in a motor with operating noise levels below 55 dB(A) under typical loads — quieter than a normal conversation.

But PREETO’s focus goes beyond numbers. During the development process, engineers conduct psychoacoustic testing, inviting riders to evaluate perceived comfort in real-world conditions. Because not all noise is equally disturbing, PREETO optimizes both measurable decibels and human-perceived sound quality.

For the rider, this means that PREETO mid-drive motors blend into the natural soundscape: the rustle of wind, the crunch of gravel, the rhythm of pedaling. What you don’t hear — the distracting buzz of a struggling motor — is the real difference.

Silent power, effortless riding.