Helitase alaneb, kui kaugus heliallikast suureneb, ja seda, mil määral helitase kauguse suurenedes langeb, mõjutavad ruumi omadused (kuju, sisustus, pinnakatted jms).
The sound level decreases as the distance from the sound source increases, and the extent to which the sound level decreases with increasing distance is affected by the characteristics of the room (shape, furnishings, surfaces, etc.).
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