INSTITUTIONAL SURVEYS - Registrered noise levels| Contact |
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| Contact organisation | National statistical institute |
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| Contact organisation unit | Environmental and Energy Accounts Department |
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| Contact name | Mariya Zlatkova |
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| Contact person function | Senior expert |
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| Contact mail address | 2 Panayot Volov St., 1038 Sofia |
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| Contact email address | [email protected] |
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| Contact phone number | +359 2 9857 182 |
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| Contact fax number | |
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| Metadata update |
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| Metadata last certified | 17 February 2025 |
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| Metadata last posted | 17 February 2025 |
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| Metadata last update | 17 February 2025 |
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| Statistical presentation |
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| Data description | Annual data about the number of points of noise registration and measured noise levels in decibels. |
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| Classification system | Not available. |
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| Sector coverage | Exhaustive survey which covers all points of noise registration in the country. |
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| Statistical concepts and definitions | The survey covers all points of noise registration in the country. |
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| Statistical unit | Point of noise registration. |
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| Statistical population | The survey covers all points for noise registration in the country. |
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| Reference area | Total for the country. |
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| Time coverage | 2019 - 2023 |
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| Base period | Not applicable. |
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| Unit of measure |
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Number; Decibels. |
| Reference period |
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Year. |
| Institutional mandate |
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| Legal acts and other agreements | Law of statistics. |
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| Data sharing | The data for registered noise levels are provided from National center for public health and analyses. |
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| Confidentiality |
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| Confidentiality - policy | · Law on Statistics; · Regulation (EC) No 223/2009 on European statistics (recital 24 and Article 20(4)) of 11 March 2009 (OJ L 87, p. 164), stipulates the need to establish common principles and guidelines ensuring the confidentiality of data used for the production of European statistics and the access to those confidential data with due account for technical developments and the requirements of users in a democratic society. |
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| Confidentiality - data treatment | Individual data are not published in accordance with article 25 of the Law on Statistics. The publishing of individual data can be performed only in accordance with article 26 of the same law. |
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| Release policy |
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| Release calendar | The date of release of statistical information is indicated in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. |
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| Release calendar access | The calendar is available on the NSI website: http://www.nsi.bg/en/node/480 |
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| User access | Data on Registrered noise levels is published on the NSI website, section Environment in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers. |
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| Frequency of dissemination |
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Yearly. |
| Accessibility and clarity |
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| News release | No. |
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| Publications | · Environment; · Statistical Reference Book; · Statistical Yearbook. |
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| On-line database | Data on Registrered noise levels are available to all users of the NSI website under the heading Environment: http://www.nsi.bg/en/node/5102 |
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| Micro-data access | Not available. |
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| Other | Information service on request, according to the Rules for the dissemination of statistical products and services in NSI. |
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| Documentation on methodology | Statistical questionnaire for registered noise levels.
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| Quality documentation | Not available. |
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| Quality management |
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| Quality assurance | The data are compared with the previous periods. |
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| Quality assessment | Not available. |
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| Relevance |
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| User needs | Main users of information for registered noise levels are different public organizations, students, sitizens and others. |
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| User satisfaction |
Not available.
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| Completeness | The data are presented at national level by districts and towns. |
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| Accuracy and reliability |
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| Overall accuracy | The data for registered noise levels cover all poins for measurement of noise levels in the country. |
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| Sampling error | Not available. |
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| Non-sampling error | Not available. |
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| Timeliness and punctuality |
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| Timeliness | The data are published according the Calendar for dissemination of statistical information. |
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| Punctuality | Not available. |
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| Coherence and comparability |
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Data are compared with previous reported periods. |
| Comparability - geographical | Not available. |
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| Comparability - over time | Not available. |
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| Coherence - cross domain | Not available. |
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| Coherence - internal | Not available. |
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| Cost and burden |
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Cost related to the collection and production of statistics on registered noise levels are announced in the National statistical programme. |
| Data revision |
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| Data revision - policy | Revision of the data is made in case of changing of methodology or found errors. |
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| Data revision - practice | The data are revised in case of necessity. |
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| Statistical processing |
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| Source data | National Center of public health and analysis. |
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| Frequency of data collection | Yearly. |
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| Data collection | Electronic questionnaire of the National Center of Public Health and Analysis. |
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| Data validation | The data are compared with the previous reported periods. |
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| Data compilation | Data are received by districts and towns from National center of public health and analyses. |
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| Adjustment | Not available. |
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| Comment |
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