The objective of this Standard is to specify two methods for estimating the loudness and loudness level of sounds as perceived by otologically normal persons under specific listening conditions. The first method is intended for stationary sounds and the second method for arbitrary non-stationary (time-varying) sounds, including stationary sounds as a special case.
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Specification of input signal and instrumentation
5 Method for stationary sounds
5.1 General
5.2 Description of the method
5.3 Calculation of loudness and loudness level
6 Method for time-varying sounds
6.1 General
6.2 Description of the method
6.3 Calculation algorithm
6.4 Guidance for determining the loudness of time-varying sounds
7 Reporting data
Annex A
A.1 Background
A.2 Filter coefficients of one-third-octave-band filters
A.3 Details of the Zwicker method
A.4 Program for the calculation of loudness according to the method for stationary sounds and the method for time-varying sounds
Annex B
B.1 Background
B.2 Third octave levels as input for stationary loudness
