4.29 equivalent threshold level (monaural earphone listening). At a specified frequency, for a specified type of earphone, and for a stated force of application of the earphone to a human ear, the sound pressure level set up by the earphone in a specified coupler or artificial ear when the earphone is activated by that voltage which, with the earphone applied to the ear concerned, would correspond with the threshold of hearing. Abbreviation, ETSPL; unit, decibel (dB).
« Back to Standards Terminolgy IndexRecent Posts
- Recent Reaffirmations Across Accredited Standards Committees
- ANSI Expands Consumer Participation Fund Resources to Cover US Technical Advisory Group Fees
- Standards Spotlight Pt. 2: Enhancing Acoustics in Student Gymnasiums and Fitness Spaces
- Standards Spotlight Pt 1: Why ASA/ANSI S12.60-2019/Part 4 (R2024) is Essential for Physical Education Spaces
- Newly Reaffirmed ASA Standards
Recent Comments