After the offending noise source has passed, the window opens again. An outside microphone, aided by software built into the window, can recognize the particular frequencies of other offending noises as well, such as the sound of heavy trucks.
द न्यू इंग्लॆंड जरनल ऑफ मॆडिसिन में प्रकाशित एक अध्ययन ने पाया कि हर दिन बस ०.८ किलोमीटर चलना भी मृत्यु दर घटा देता है ।