This is a soundscape of the area around a waterfall at Mount Baldy. The TASCAM DR-40 sound recorder was attached to a tripod and placed approximately 8ft above ground level on a surrounding hill slope. The waterfall itself was surrounded by high slopes and directly in front of it was just open space.
About the Soundscape:
Keynotes – From the beginning to the end of the soundscape, the waterfall can be heard flowing through its path, formed by rocks. The wind is heard in the background throughout the recording but only comes to the forefront when it blows strongly a couple of times (no windshield was used)
One of the most constant soundmarks is the sound of hikers as well as families with small children coming to sit and hang around the peaceful waterfall. This waterfall is one of the main sites at Mount Baldy and there is always a chatter coming from around it.
The only signal that can be heard in this recording is the crunching of gravel from people walking along the dirt tracks. However, this is sound is almost inaudible as the paths were rather far away
This is a rectangular basement parking garage located underneath the Scripps College field. The space itself is made up of only concrete walls and pillars that cause sounds in the space to produce a prolonged echo. The lot was about half full, however, it must be noted that there were no cars around where the balloon was popped so as to avoid any of their alarms going off. There were no background sounds. The space was pin-drop silent while this balloon pop was recorded.
I used a TASCAM DR-40 sound recorder to record this reverberant space. My friend burst the balloon while I operated the sound recorder. The recorder was located approximately 4 feet from the balloon, which was popped in the middle of the parking lot.
30 dB decay: 1.3 seconds
50 dB decay: 2.3 seconds
60 dB decay: –
decay to background level: 2.9 seconds
Being an underground car park, the space was surrounded by nothing but cement (the walls, ceiling, pillars, and floor!). This meant that there was bound to be a prolonged echo no matter what. The fact that the parking lot was relatively empty only increased the chances of this happening. It is because of this echo that it takes the surrounding area so long (2.9 seconds) to return to its original sound level.
Due to the fact that the balloon was popped in a relatively enclosed solid space, it reached a massive 89.135 dB as its maximum intensity. From the spectrogram above we can see that there was barely any background noises prior to the balloon pop. This graph also shows that the sound lingers before dissipating slowly.