Sounds for both map and table: Numerical statistical values are presented as music instrument pitches. Values are divided into 5 categories presented by 5 pitches. A low pitch indicates a low value category. By default, "tremolo string" pitches are used for geographical regions that meet the current query criterias. "grand piano" pitches are used for geographical regions that have been filtered out by the current query criterias. For information about query or filtering, please refer to the topic "Data Interaction".
Sounds for map: Besides the 5 pitches used for the numerical statistical values, several other sounds are used for map. By default, a "woodblock" sound presents crossing a region border, a "guitar gret noise" sound presents a background which is an area that doesn't contain any census geographical regions. A background can actually be an ocean, a lake, or a geographical region that is not part of the current map. When mutiple geographical regions are swept horizontally or vertically according to their geographical locations, a "woodblock" sound indicates the end of each sweep row or column, and a "grand piano" sound indicates the end of the sweep.
Sounds for table: Currently, no other non-speech sounds are used in table besides the 5 pitches used for the numerical statistical values.