صدای تهویه

زیرزمین داخلی - فلزی تهویه لوله clattering پیمانکاران مشغول به کار است.

Bathroom ventilation fan.

Bathroom fan in house, old and rattling, on and off cycle, room perspective.

Bathroom fan in house, old and rattling, steady on, room perspective.

Bathroom fan at The Lab, air movement, hand dryer cycle, room perspective.

Bathroom fan in house, old and wobbly, turn on and slowly speed up, room perspective.

Bathroom fan in house, old and rattling, on and off cycle, close perspective.

Bathroom fan in house, old and rattling, steady on, close perspective.

Bathroom fan at The Lab, air movement, steady, room perspective.

Bathroom fan at The Lab, air movement, close perspective.

سیستم تهویه مطبوع - حمام - ثابت - حلقه هاست.

High-pitched tone and humming from a steel tower wind turbine (7).

Humming ventilation shaft from inside a wind turbine (5).

موتور اتاق تن - بالا زنگ مانند وزوز.

پتک ضربه دریچه هوا - زمین بالا.