Audio Environment Report
The Auditory Environment report reveals the quantity of each of 5 audio data categories for the recording:
Meaningful - Any live, in-the-room human vocalizations from adult male, adult female, key child, and other child speakers - that is, speaker labels MAN, FAN, CHN, and CXN. Meaningful speech does not include overlap segments. Meaningful speech includes only segments that are considered to be near and clear to the child. In general, the bar with the most green represents the region of the recording with the highest likelihood of language input and output.
Distant (+ Overlap) - Segments that don't match LENA's speaker models well due to quality or being too distant from the mic (MAF, FAF, CHF, CXF), plus all overlapping segments (OLN, OLF). Overlap occurs whenever a human voice overlaps with something else - another human voice, sounds from a speaker, or noise. LENA does not "credit" or apply counts to Overlap segments. Usually, most of this blue category is made up of these overlap segments.
TV and Electronic Sounds - Sounds from a television, radio, or other electronic media. These could be music, a TV show, synthesized toy sounds, incoming communication via Skype/FaceTime, or anything else emanating from a speaker. This category represents the amount of time during which TV/electronic sounds were the dominant signal in the recording (TVN).
Noise - Bumps, jiggles, rattles, impact sounds, friction sounds, motors...all noises that don't come from a human vocal tract or an electronic speaker - LENA speaker label NON.
Silence & Background - Silence, faint noise, faint TV (SIL, NOF, TVF).
Orientation to the Auditory Environment report
The software plots the composition of the auditory environment on a chart for easy viewing. The horizontal axis displays the interval for which data exist. In contrast to the other reports, here the vertical axis represents the total amount of recorded time in the interval. A full bar at the hourly level represents 60 minutes, and a full bar at the 5-minute level represents 5 minutes of recordings. Shorter bars occur when the recording was stopped or started sometime within the interval shown. In the illustration below, the recording day began around 7:43 a.m., so the first bar reflects a partial hour.
The Auditory Environment report contains all of the following features described elsewhere in this chapter:
- drop-down child list for easy navigation among children
- time interval selector to control the viewing resolution
- date selector bar (scroll bar and drop-down calendar) to select the date and/or time of interest
- audio clip playback and export options at the 5-minute level (not shown in this hourly image)
- print report button
- export data button
- report navigation buttons for easy navigation among one child's reports
Audio Environment data are displayed as follows:
Duration and percentage of total time for each sound category.
For daily, hourly, and 5-minute resolutions, the actual composition for that interval is displayed.
In the monthly view, the rollover data displays the average durations and percentages for all recordings in that month.
TV & ES Filter.
Check the box in the lower right to see only the TV/Electronic category. The data are presented as a bar graph in the monthly, daily, and 5-minute view, but the hourly view, shown below, reveals the pattern of electronic media exposure over the course of the recording selected.
