Elongated sound isolation devices and systems
Systems and devices are disclosed herein for absorbing unwanted target sounds. In one example, an acoustic scatterer for absorbing a target sound includes a housing defining a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The acoustic scatterer also includes one or more spacers subdividing the plurality of channels along the length of the housing. In another example, a system for absorbing a target sound includes a plurality of acoustic scatterers, each having a housing that defines a plurality of channels having an open end and a terminal end. The terminal ends of the plurality of channels are separate from each other and extend along a length of the housing. The plurality of acoustic scatterers are stacked on top of each other in a lengthwise direction.
1. An acoustic scatterer for absorbing a target sound comprising:
a housing defining a plurality of channels having an open end and a terminal end, the terminal ends of the plurality of channels being separate from each other and extending along a length of the housing; and
at least one spacer subdividing the plurality of channels along the length of the housing that defines a height of the plurality of channels along the length of the housing, the height of the plurality of channels being approximately 0.4 to 0.8 of the wavelength of the target sound.
2. The acoustic scatterer of claim 1 , wherein the height of each of the plurality of channels is approximately 0.6 of the wavelength of the target sound.
3. The acoustic scatterer of claim 1 , wherein resonant frequencies of the plurality of channels is substantially equal to a frequency of the target sound.
4. The acoustic scatterer of claim 1 , wherein a cross-section along a width of the acoustic scatterer defines a symmetrical shape having at least one line of symmetry, the symmetrical shape having an outer surface, wherein the open end of the plurality of channels are adjacent to the outer surface.
5. The acoustic scatterer of claim 1 , wherein each channel of the plurality of channels have a substantially similar volume.
6. The acoustic scatterer of claim 1 , wherein each channel of the plurality of channels have a substantially similar shape across a width of the acoustic scatterer.
7. The acoustic scatterer of claim 1 , wherein the housing is made of a unitary structure, and the spacer is made of a separate structure.
8. The acoustic scatterer of claim 7 , wherein the spacer includes:
an outer perimeter; and
a plurality of extensions that extend from the outer perimeter towards a center of the spacer, the plurality of extensions having a shape based on a shape of the plurality of channels.
9. The acoustic scatterer of claim 8 , wherein the outer perimeter of the spacer is adjacent to an outer surface of the housing.
10. The acoustic scatterer of claim 9 , further comprising a retainer directly adjacent to the outer perimeter of the spacer and the outer surface of the housing, the retainer being configured to hold the spacer in place with respect to the housing.
11. A system for absorbing a target sound comprising:
a plurality of acoustic scatterers, each having a housing that defines a plurality of channels having an open end and a terminal end, the terminal ends of the plurality of channels being separate from each other and extending along a length of the housing, the plurality of acoustic scatterers having a height that extends along the length of the housing;
the plurality of acoustic scatterers are stacked on top of each other in a lengthwise direction;
the height of the plurality of acoustic channels of each of the plurality of acoustic scatterers is approximately 0.4 to 0.8 of the wavelength of the target sound;
the open end of each of the plurality of acoustic scatterers extends along the lengths of each of the plurality of acoustic scatterers; and
the open end of each of the plurality of acoustic scatterers are aligned with each other in the lengthwise direction.
12. The system of claim 11 , wherein the height of the plurality of acoustic channels of each of the plurality of acoustic scatterers is approximately 0.6 of the wavelength of the target sound.
13. The system of claim 11 , wherein resonant frequencies of the plurality of channels is substantially equal to a frequency of the target sound.
14. The system of claim 11 , wherein a cross-section along a width of one of the plurality of acoustic scatterers defines a symmetrical shape having at least one line of symmetry, the symmetrical shape having an outer surface, wherein the open end of the plurality of channels are adjacent to the outer surface.
15. The system of claim 11 , wherein each channel of the plurality of channels have a substantially similar volume.
16. The system of claim 11 , wherein each channel of the plurality of channels have a substantially similar shape across a width of one of the plurality of acoustic scatterers.