From the dimensions Bruce gave and my little Mathcad program the room modes up to 200 Hz are (in Hz):
25.682
41.852
51.364
53.81
77.045
83.704
102.727
107.619
125.556
128.409
154.091
161.429
167.407
179.773
Don,
We get many more if we include tangential and obliques
Full simulation of room (6.71m) :
( Courtesy of
http://www.bobgolds.com/Mode/RoomModes.htm To see the tables correctly formatted please cut and paste them in Excel. )
Frequency hz Spacing % Wavelength 1/2 Wavelength 1/4 Wavelength p q r Mode
25.7 13.4 6.7 3.35 1 0 0 Axial
41.9 38.6 8.22 4.11 2.06 0 1 0 Axial
49.1 14.6 7.01 3.51 1.75 1 1 0 Tangential
51.3 4.2 6.71 3.36 1.68 2 0 0 Axial
53.8 4.6 6.4 3.2 1.6 0 0 1 Axial
59.6 9.7 5.78 2.89 1.44 1 0 1 Tangential
66.3 10.1 5.19 2.6 1.3 2 1 0 Tangential
68.2 2.7 5.05 2.53 1.26 0 1 1 Tangential
72.9 6.4 4.72 2.36 1.18 1 1 1 Oblique
74.4 2 4.63 2.31 1.16 2 0 1 Tangential
77.0 3.3 4.47 2.24 1.12 3 0 0 Axial
83.8 8.1 4.11 2.06 1.03 0 2 0 Axial
85.4 1.8 4.03 2.02 1.01 2 1 1 Oblique
87.6 2.5 3.93 1.97 0.98 1 2 0 Tangential
87.7 0.1 3.93 1.96 0.98 3 1 0 Tangential
93.9 6.6 3.67 1.83 0.92 3 0 1 Tangential
98.3 4.4 3.5 1.75 0.88 2 2 0 Tangential
99.6 1.3 3.46 1.73 0.86 0 2 1 Tangential
102.7 3 3.35 1.68 0.84 4 0 0 Axial
102.8 0 3.35 1.68 0.84 1 2 1 Oblique
102.9 0 3.35 1.67 0.84 3 1 1 Oblique
107.6 4.3 3.2 1.6 0.8 0 0 2 Axial
110.7 2.8 3.11 1.56 0.78 1 0 2 Tangential
110.9 0.1 3.11 1.55 0.78 4 1 0 Tangential
112.0 0.9 3.08 1.54 0.77 2 2 1 Oblique
113.8 1.5 3.03 1.51 0.76 3 2 0 Tangential
115.5 1.4 2.98 1.49 0.75 0 1 2 Tangential
115.9 0.3 2.97 1.49 0.74 4 0 1 Tangential
118.3 2 2.91 1.46 0.73 1 1 2 Oblique
119.2 0.7 2.89 1.44 0.72 2 0 2 Tangential
123.3 3.3 2.79 1.4 0.7 4 1 1 Oblique
125.7 1.9 2.74 1.37 0.69 0 3 0 Axial
125.9 0.1 2.74 1.37 0.68 3 2 1 Oblique
126.4 0.3 2.72 1.36 0.68 2 1 2 Oblique
128.3 1.4 2.68 1.34 0.67 1 3 0 Tangential
128.3 0 2.68 1.34 0.67 5 0 0 Axial
132.3 3 2.6 1.3 0.65 3 0 2 Tangential
132.5 0.1 2.6 1.3 0.65 4 2 0 Tangential
135.0 1.8 2.55 1.28 0.64 5 1 0 Tangential
135.8 0.5 2.54 1.27 0.63 2 3 0 Tangential
136.4 0.4 2.53 1.26 0.63 0 2 2 Tangential
136.7 0.2 2.52 1.26 0.63 0 3 1 Tangential
138.8 1.5 2.48 1.24 0.62 1 2 2 Oblique
138.8 0 2.48 1.24 0.62 3 1 2 Oblique
139.1 0.2 2.48 1.24 0.62 1 3 1 Oblique
139.2 0 2.47 1.24 0.62 5 0 1 Tangential
143.0 2.6 2.41 1.2 0.6 4 2 1 Oblique
145.3 1.5 2.37 1.19 0.59 5 1 1 Oblique
145.7 0.2 2.36 1.18 0.59 2 2 2 Oblique
146.1 0.2 2.36 1.18 0.59 2 3 1 Oblique
147.4 0.8 2.34 1.17 0.58 3 3 0 Tangential
148.7 0.8 2.32 1.16 0.58 4 0 2 Tangential
153.3 3 2.25 1.12 0.56 5 2 0 Tangential
154.0 0.4 2.24 1.12 0.56 6 0 0 Axial
154.5 0.3 2.23 1.11 0.56 4 1 2 Oblique
156.6 1.3 2.2 1.1 0.55 3 2 2 Oblique
156.9 0.1 2.2 1.1 0.55 3 3 1 Oblique
159.6 1.6 2.16 1.08 0.54 6 1 0 Tangential
161.4 1.1 2.13 1.07 0.53 0 0 3 Axial
162.3 0.5 2.12 1.06 0.53 4 3 0 Tangential
162.4 0 2.12 1.06 0.53 5 2 1 Oblique
163.1 0.4 2.11 1.06 0.53 6 0 1 Tangential
163.5 0.2 2.11 1.05 0.53 1 0 3 Tangential
165.5 1.2 2.08 1.04 0.52 0 3 2 Tangential
166.8 0.7 2.06 1.03 0.52 0 1 3 Tangential
167.5 0.4 2.06 1.03 0.51 1 3 2 Oblique
167.5 0 2.06 1.03 0.51 5 0 2 Tangential
167.6 0 2.06 1.03 0.51 0 4 0 Axial
168.4 0.4 2.05 1.02 0.51 6 1 1 Oblique
168.8 0.2 2.04 1.02 0.51 1 1 3 Oblique
169.4 0.3 2.03 1.02 0.51 2 0 3 Tangential
169.6 0.1 2.03 1.02 0.51 1 4 0 Tangential
170.7 0.6 2.02 1.01 0.5 4 2 2 Oblique
171.0 0.1 2.01 1.01 0.5 4 3 1 Oblique
172.6 0.9 2 1 0.5 5 1 2 Oblique
173.3 0.4 1.99 0.99 0.5 2 3 2 Oblique
174.5 0.6 1.97 0.99 0.49 2 1 3 Oblique