Acoustic wall assembly having double-wall configuration and passive noise-disruptive properties, and/or method of making and/or using the same
Certain example embodiments relate to an acoustic wall assembly that uses active and/or passive sound reverberation to achieve noise-disruptive functionality, and/or a method of making and/or using the same. With the active approach, sound waves in a given frequency range are detected by a sound masking circuit. Responsive to detection of such sound waves, an air pump (e.g., speaker) is used to pump air in the wall assembly to actively mask the detected sound waves via reverberation and/or the like. The wall assembly may include one, two, or more walls, and the walls may be partial or full walls. With the passive approach, sound waves in a given frequency range are disrupted via features (e.g., holes, slits, etc.) formed in and/or on a wall itself. These techniques may be used together or separately, in different example embodiments.
1. An acoustic wall assembly, comprising:
inner and outer walls that are substantially parallel to one another, a gap being defined therebetween; and
at least one set of openings formed in the inner and/or outer wall(s), the at least one set of openings being sized, shaped, and arranged to cooperate with the inner and outer walls to generate reverberation that masks, without substantially attenuating, sound waves incident on the wall(s) in which the at least one set of openings is/are formed.
2. The acoustic wall assembly of claim 1 , wherein the at least one set of openings is configured to generate reverberation that masks sound waves incident on the wall(s) in which the at least one set of openings is/are formed, by causing reverberation in a first predetermined sound frequency range that disrupts sounds in a second predetermined sound frequency range that exist in the incident sound waves.
3. The acoustic wall assembly of claim 1 , wherein the at least one set of openings is configured to cause reverberation in a predetermined sound frequency range.
4. The acoustic wall assembly of claim 3 , wherein the predetermined frequency range corresponds to speech and/or noise determined to be psychoacoustically disruptive, disturbing, or annoying.
5. The acoustic wall assembly of claim 3 , wherein the predetermined frequency range is 28-3200 Hz.
6. The acoustic wall assembly of claim 1 , further comprising at least one further set of openings formed in the inner and/or outer wall(s).
7. The acoustic wall assembly of claim 6 , wherein:
the at least one set of openings is configured to cause reverberation in a first predetermined sound frequency range, and
the at least one further set of openings is configured to cause reverberation in a second predetermined sound frequency range, the first and second predetermined sound frequency ranges being different from one another.
8. The acoustic wall assembly of claim 1 , wherein the inner and outer walls are glass walls.
9. The acoustic wall assembly of claim 1 , wherein at least one first set of openings is formed in the inner wall, and at least one second set of openings is formed in the outer wall, the first and second sets being different from one another.
10. The acoustic wall assembly of claim 1 , wherein at least one first set of openings is formed in the inner wall, and at least one second set of openings is formed in the outer wall, the first and second sets being different from one another and causing generated reverberation to be directional relative to inner and outer major surfaces of the acoustic wall assembly.
11. The acoustic wall assembly of claim 1 , wherein the inner and outer walls are partial-height walls.
12. The acoustic wall assembly of claim 1 , wherein the at least one set of openings includes exactly one opening.
13. The acoustic wall assembly of claim 1 , wherein the at least one set of openings includes at least two openings.
14. The acoustic wall assembly of claim 1 , wherein the wall has acoustic absorption coefficients ranging from: 0.03-0.3 at 125 Hz, 0.03-0.6 at 250 Hz, 0.03-0.6 Hz at 500 Hz; 0.03-0.9 at 1000 Hz, 0.02-0.9 at 2000 Hz, and 0.02-0.8 at 4000 Hz.
15. The acoustic wall assembly of claim 1 , wherein the at least one set of openings are sized, shaped, and arranged to cooperate with the inner and outer walls to generate reverberation that eliminates artificially created infra-sound frequencies.
16. The acoustic wall assembly of claim 1 , wherein the at least one set of openings are sized, shaped, and arranged to cooperate with the inner and outer walls to generate reverberation that compensates for flanking losses related to the inner and outer walls and/or infra-sound beating.