Table 1.

A partial listing of common LENA abbreviations and their meanings

Abbreviations	Meanings
FAN, MAN, CHN, CXN	Basic “meaningful speech” (near and clear speech) categories used by LENA for further processing: Female Adult Near, Male Adult Near, Key Child Near and Other Child Near categories respectively.
NON, TVN, OLN, SIL	Basic non-speech categories: Noise Near, Television Near, Overlap Near, Silence.
FAF, MAF, etc.	“Far” (low probability) versions of each Near category.
Key child	Child wearing recorder
AWC	Adult Word Count (estimated within FAN and MAN vocalizations)
CVC	Child Vocalization Count (estimated for non-cry, non-vegetative portions of CHN)
CTC	Conversational Turn Count (estimated for turns between FAN or MAN and CHN)