Author Archives: Molly Cole

Soundscape CMC Fritz B. Burns Stadium 2:15pm on Monday, Feb 10th, 2014



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Image from

This picture was taken from the western/top-most portion of the stadium.

Location: This soundscape was taken at 2:15 on Monday, February 10th, 2014 on top of Fritz B. Burns Stadium at Claremont-McKenna College.

Recording Setup:  The recorder was placed on the top-most purple bleacher (see picture) on the west third of the stadium.  It was located furthest east on this third of the stadium.  About a foot from behind the recorder was a concrete wall that was around 3 feet high.

Recording Device: TASCAM DR-40 Sound Recorder, set to volume 33

About the Soundscape:

This space really demonstrates the sense of calmness and quiet that is present in the non-classroom-setting of the Claremont Colleges in the middle of a weekday. One keynote of this soundscape is the scraping sound of the groundskeepers shoveling dirt and sand at the softball field.  Interestingly, sound seems to carry very well from atop this stadium, and we can hear the rise and fall of the sand fairly distinctly even though it is far away.  This keynote is also probably seasonal because maintenance seems to be occurring on the field areas mainly during the peak of sports’ seasons.  Another keynote present here is wind, which I did not originally associate with the Claremont Colleges, but atop the stadium, it is quite prevalent.  The main soundmark of this stadium is the runner we hear towards the end of this recording.  This is not only an archetypal soundmark to signify that this is an athletic area with a track, but one that also distinguishes it from Pomona’s track, acting as an actual soundmark.  If we heard a runner on Pomona’s track, which does not have stadium bleachers, the sound of her footsteps would be much softer and of a different quality since track material is rubberized and absorbant.  In contrast, we hear the runner’s cushiony sounding steps at first (while he is on the track), followed by slightly reverberating, louder steps, made by the runner’s shoes on the concrete of the stadium steps as he runs up and down.


Pomona College Seaver Theater 12:35pm Tuesday Feb 11th, 2014


Description of the space:


This recording was taken at 12:35pm on Tuesday, February 11th, 2014 in the courtyard of Seaver Theater, which is located at 312 E. 4th Street, Claremont, CA. 91711 (see above satellite image by GoogleMaps).

Recording setup: The recorder (on its tripod) was set in the middle of the courtyard on the concrete ground, and all backpacks and other recording materials were moved far out of the way.  The balloon was popped approximately three feet in front of the recorder and four and a half feet above it.

Recording device: TASCAM DR-40 Sound Recorder, set to volume 33

Reverberation time:

30 dB decay: 0.209 seconds

50 dB decay: 2.554 seconds

decay to background level: 2.556 seconds (but reached minimum post-pop sound level at 4.1573 seconds)

60 dB decay: did not occur

Acoustic Description:



As we can see, the above sound images show a fairly fast initial drop in sound at the onset of the balloon pop (down 30dB), followed by a slower decrease to the minimum level of post-pop sound.  We can try to account for these characteristics by analyzing the spatial features of the vicinity of the balloon pop. Seaver Theater is normally a fairly quiet space, but because of the construction of the new art building nearby, the background noise level during this time was fairly high.  I thought that recording around 12:30 would minimize potential conflicting background noise, since students would not be walking to class at the theater and the many of the construction workers would be on lunch breaks.  Also, there are many trees and branching plants in and surrounding the courtyard, so many birds nest here (as one might hear on this recording before the balloon pop).  This fact might be able to explain why the sound level actually dropped to 26.2dB, or below the level of pre-pop background noise (which was about, on average, 32.4dB).  The birds’ reaction times to the noise would then also contribute to how fast the sound level dropped to its minimum point.

Furthermore, the courtyard of Seaver Theater is surrounded by tall, cement walls, where sound can bounce off and reverberate.  Indeed, there is even a tall, cement staircase (at the southernmost part of the courtyard in the satellite image above) that the balloon was popped from about 8 feet away.  There are only a few places where sound can escape.  The most obvious is from the top, as no ceiling exists in this courtyard.  There are also various entry and exit-ways through which sound may escape.  Thus, although the sound might have dropped fast at first (due to the initial decay out of the courtyard through the top opening and sides), bits of it were still left over, reverberating back and forth off the high walls until all the sound was finally able to “bounce” out of the courtyard and into the sky.