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Benchmark Problem A1-1F

-Properties-
category
type
index
domain
object
note
A. exterior
1. practical
A1-1F
frequency
speaker
radiation

Geometry:
Loud speaker in the free field. (Fig. A1-1F-1).

Boundary condition:
All faces are rigid boundaries other than corn paper shown in fig A1-1F-1, assuming its stationary vibration with acceleration amplitude 1.0 m/s2.
 
-Task A-

Directivity:
Sound pressure amplitude [Pa] at 19 points (R1), 3m away from the corn paper's center on the plane z = 0, located at 10 deg intervals (theta = 0, 10, 20, 30, ..., 180 deg). At the octave-band mid-frequencies (f = 31.5, 63, 125, 250, 500, 1k, 2k, 4k Hz).

Dataform:
d-a1-1fa.xls

Contribution:
  • [04/05/31] A1-1FA-02: Measured results, Ikeda, M.
  • [04/05/31] A1-1FA-01: BEM (SYSNOISE), Ikeda, M.
-Task B-

Frequency response:
Sound pressure amplitude [Pa] at R2 (1m from the center of corn paper) at the frequencies with 1 Hz intervals from 20 Hz to 4 kHz; or with 50 Hz intervals from 50 Hz to 4 kHz.

Dataform:
d-a1-1fb.xls

Contribution:
  • [04/05/31] A1-1FB-01: BEM (SYSNOISE), Ikeda, M.

Fig. A1-1F-1: Geometry of problem A1-1F .