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Updated: Aug 13, 2026

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
Published on: January 23, 2017
Abstract:
In the fields of community noise abatement and municipal planning, there are new requirements to define an environment of varying noise level by a single number rating method that correlates well with the subjective response of human beings. Typical criteria, either in use of proposed, are LN numbers (noise levels exceeded N% of the time), Leq (the equivalent sound level in dB(A) ), LNP (the Noise Pollution Level), and Ldn (the day-night average sound level in dB(A) ). Instruments available include an environmental noise classifier, a statistical distribution analyzer/recorder combination, and a digital sampling system for field measurements for subsequent interrogation by a programmable calculator.
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