This part of ISO 1996 defines the basic quantities to be used for the description of noise in community environments and describes basic assessment procedures. It also specifies methods to assess environmental noise and gives guidance on predicting the potential annoyance response of a community to long-term exposure from various types of environmental noises. The sound sources can be separate or in various combinations. Application of the method to predict annoyance response is limited to areas where people reside and to related long-term land uses. Community response to noise can vary differently among sound sources that are observed to have the same acoustic levels. This part of ISO 1996 describes adjustments for sounds that have different characteristics. The term “rating level” is used to describe physical sound predictions or measurements to which one or more adjustments have been added. On the basis of these rating levels, the long-term community response can be estimated. The sounds are assessed either singly or in combination, allowing for consideration, when deemed necessary by responsible authorities, of the special characteristics of their impulsiveness, tonality, and low-frequency content, and for the different characteristics of road-traffic noise, other forms of transportation noise (such as aircraft noise), and industrial noise. This part of ISO 1996 does not specify limits for environmental noise.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Expression of levels
3.2 Time intervals
3.3 Ratings
3.4 Sound designations
3.5 Impulsive sound sources
3.6 Day, evening, night sound levels
4 Symbols
5 Descriptors for environmental noise(s)
5.1 Single events
5.2 Repetitive single events
5.3 Continuous sound
6 Noise annoyance
6.1 Descriptors for community noise
6.2 Frequency weightings
6.3 Adjusted levels
6.4 Rating levels
6.5 Composite whole-day rating levels
7 Noise limit requirements
7.1 General
7.2 Specifications
8 Reporting assessments of environmental noise(s) and estimation of long-term community annoyance response
8.1 Estimation of long-term annoyance response of communities
8.2 Test report
Annex A Adjustments for sound source rating levels (informative)
Annex B High-energy impulse sounds (informative)
Annex C Sounds with strong low-frequency content (informative)
Annex D Relationships to estimate the percentage of a population highly annoyed and the 95 % prediction interval as a function of adjusted day-evening-night and day-night sound levels (informative)
Annex E Estimated prevalence of a population highly annoyed as a function of adjusted day-evening-night or day-night sound levels using the community tolerance level formulation (informative)
Annex F Estimated prevalence of a population highly annoyed as a function of adjusted day-evening-night or day-night sound level using a regression formulation (informative)
Annex G Annoyance caused by exposure to sound in multi-source environments (informative)
Annex H Theory-based approach to predict the growth of annoyance (informative)
8 Reporting assessments of environmental noise(s) and estimation of long-term community annoyance response
8.1 Estimation of long-term annoyance response of communities
8.2 Test report
Annex A Adjustments for sound source rating levels (informative)
Annex B High-energy impulse sounds (informative)
Annex C Sounds with strong low-frequency content (informative)
Annex D Relationships to estimate the percentage of a population highly annoyed and the 95 % prediction interval as a function of adjusted day-evening-night and day-night sound levels (informative)
Annex E Estimated prevalence of a population highly annoyed as a function of adjusted day-evening-night or day-night sound levels using the community tolerance level formulation (informative)
Annex F Estimated prevalence of a population highly annoyed as a function of adjusted day-evening-night or day-night sound level using a regression formulation (informative)
Annex G Annoyance caused by exposure to sound in multi-source environments (informative)
Annex H Theory-based approach to predict the growth of annoyance (informative)