Why some sounds travel through walls more easily than others

I can hear the bass from a neighbor's music through a wall, but almost none of the singer's voice. The wall hasn't somehow filtered out lyrics intentionally. Is it because low-frequency sound bends around obstacles more readily, travels through building structures differently, or both? I'd love a simple explanation of why heavy thumps get through while higher notes disappear.

  • explain-simply
  • sounds
  • travel
  • walls
19

5 replies · Sort: Best

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  1. TD
    theo.paz
    4 points

    4 replies

    Low sounds usually carry farther because they’re harder to block and they don’t get absorbed as easily by walls and furniture. A wall can kn...

    44 replies

    Low sounds usually carry farther because they’re harder to block and they don’t get absorbed as easily by walls and furniture. A wall can knock down some of the higher stuff, but the bass has enough energy to keep shaking the structure itself.

    4
    1. ST
      sergius
      3 points

      Right, and “travel through walls” is a little misleading. It’s not sneaking politely through a hallway; it’s vibrating the whole building like the building is part of the speaker.

      3
    2. PW
      softreset
      4 points

      I always think of it like trying to stop a slow heavy cart versus a basket of feathers. The feathers disappear into the mess of the wall, the cart just keeps rolling.

      4

        That picture helps, but I’m still fuzzy on why the voice seems to vanish more than the bass. Is it mostly because the wall blocks the higher...