Isobel and events maps offer concrete soundscape notation methods

Evidence

The isobel map derives from the contour maps of geographers and meteorologists, and consists of hundreds or thousands of readings on a sound level meter averaged out to produce bars of equal intensity, projected as if the observer were above the field of study. On such a map the quietest and noisiest sections of a territory can be immediately identified. … Material for the events map would have to be limited to a specific period of time and would be gathered by walking over or around the selected location. — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 452

Categorization

• SEED: Directly usable field methodology: how to build isobel and events maps of one’s own neighborhood.
• DEFINE: Defines the isobel contour map and events map as two aerial sonography techniques.
• corroborated: 2 independent passages support this claim — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 452
• XREF: connects to: Soundwalks use mapped scores to guide attention to specific sounds — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 695; Soundscapes can be deliberately orchestrated like musical compositions — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 794; Sound maps are built from repeatable measurement methods — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 884 (+2 more)

Broader Connections

• Sound maps are built from repeatable measurement methods #expands (0.60) — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 884
• Natural soundscapes are best understood by comparative listening #expands (0.40) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 242