Confronting ISO: On the Use of the dBA Symbol for A-Weighted Sound Levels
DOI:
https://doi.org/10.37537/rev.elektron.9.2.216.2025Keywords:
ISO, units, decibel AAbstract
The International Organization for Standardization (ISO) recommends the symbol dB for all instances where decibel units are used, particularly in the cases of quantities such as the A-weighted and C-weighted sound pressure levels, ruling out the symbols dBA y dBC. In this paper several arguments are put forward as to why such recommendation is mistaken and should be revised, taking into account that the dB prefix is used in the symbols of many substantially different units as well as the fact that there are examples of situations where the criterion hereby proposed is accepted.Downloads
References
ISO 80000-3:2006 Quantities and units — Part 3: Space and time
ISO 80000-8:2006 Quantities and units — Part 8: Acoustics
BIPM (2019). The International System of Units (9th edition), p. 132, 127
https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf
OIML D 2 Consolidated Edition 2007 (E) Legal units of measurement
https://www.oiml.org/en/publications/documents/en/files/pdf_d/d002-e07.pdf
IEC 61672-1:2013 Electroacoustics - Sound level meters - Part 1: Specifications
De las Casas Ayala, José María (1991) Curso de Iluminación integrada en la Arquitectura. Servicio de Publicaciones del Colegio Oficial de Arquitectos de Madrid. Madrid.
Ferrero, Alejandro; Campos, Joaquín (2021) ¿Es la intensidad luminosa la magnitud más fundamental para medir la luz? Instituto de Óptica “Daza de Valdés” (IO, CSIC). e-medida N° 18-
ISO 226:2023 Acoustics — Normal equal-loudness-level contours
Cowan, James P. (2016) The Effects of Sound on People. John Wiley & Sons, Inc.
Manik, Dhanesh N. (2017) Vibro-Acoustics: Fundamentals and Applications. CRC Press
Beranek, Leo (comp.) (1988) Noise and Vibration Control. Institute of Noise Control Engineers
Harris, Cyril (comp.) (1994) Handbook of Noise Control and Acoustical Measurements.
Fritschi, Lin; Brown, A. Lex; Kim, Rokho; Schwela, Dietrich; Kephalopoulos, Stelios (comp) (2011) Burden of disease from environmental noise Quantification of healthy life years lost in Europe. World Health Organization.
https://iris.who.int/bitstream/handle/10665/326424/9789289002295-eng.pdf?sequence=1
Beranek, Leo; Vér, István (comps.) (1992) Noise and Vibration Control Engineering. Principles and Applications. John Wiley & Sons, Inc.
Waugh, R. (1973) dBA Attenuation of Ear Protectors. J. Acoust. Soc. Am. 53, 440–447.
https://doi.org/10.1121/1.1913341
Ballesteros Garrido, María Jesús (2014) Análisis del ruido de ocio, propuesta de procedimientos y herramientas de gestión. Tesis Doctoral Universidad Politécnica de Madrid
https://oa.upm.es/32847/1/MARIA_JESUS_BALLESTEROS_GARRIDO.pdf
Accolti, Ernesto (2015) Generación automática de paisajes sonoros realistas con espectro, distribución de duraciones y categorías
semánticas especificados. Tesis doctoral FCEIA Universidad Nacional de Rosario.
Berglund, Birgitta; Lindvall, Thomas (1995) Community Noise. Stockholm University and Karolinska Institute.
https://docs.wind-watch.org/WHO-communitynoise.pdf
Berglund, Birgitta; Lindvall, Thomas, Schella, Dietrich; Goh, Kee-Tai (2000) Guidelines for Community Noise. World Health Organisation.
https://iris.who.int/bitstream/handle/10665/66217/a68672.pdf?sequence=1&isAllowed=y
Goelzer, Berenice; Hansen, Colin H.; Sehrndt, Gustav A. (2001) Occupational Exposure to Noise: Evaluation, Prevention and Control. Publication Series from the Federal Institute for Occupational Safety and Health. Special Report S 64. World Health Organization.
LEY L - N° 1.540 Control de la contaminación acústica en la ciudad autónoma de Buenos Aires (texto consolidado 2017).
Ministerio de Transportes, Movilidad y Agenda Urbana (2019) Documento Básico HR Protección frente al ruido.
https://www.codigotecnico.org/pdf/Documentos/HR/DBHR.pdf
New York City (2016) Noise Code
https://www.nyc.gov/site/dep/environment/noise-code.page
City of Paris (2025) Code of Ordinances chevron_right Chapter 8 Offenses and Additional Provisions chevron_right ARTICLE 8.04 NOISE
Swiss Federal Council (2025) 814.41 Noise Abatement Ordinance (NAO)
https://www.fedlex.admin.ch/eli/cc/1987/338_338_338/en
ISO/IWA 24:2016(en) Non-sewered sanitation systems — General safety and performance requirements for design and testing
https://www.iso.org/obp/ui/#iso:std:iso:iwa:24:ed-1:v1:en:fn:1
ISO 16976:2023 Respiratory protective devices — Human factors — Part 7: Hearing and speech
https://cdn.standards.iteh.ai/samples/82900/e8693e672dc54fd68794937a154a0d2f/ISO-16976-7-2023.pdf
ITU-R BS.1771-1 (01/2012) Requirements for loudness and true-peak indicating meters
https://www.itu.int/dms_pubrec/itu-r/rec/bs/r-rec-bs.1771-1-201201-i!!pdf-e.pdf
ITU-T H.872 (10/2024) E-health multimedia systems, services and applications – Safe listening. Safe listening for video gameplay and esports
https://www.itu.int/rec/T-REC-H.872-202410-I/en
ITU-R V.574-5 (08/2015) Use of the decibel and the neper in telecommunications
https://www.itu.int/dms_pubrec/itu-r/rec/v/R-REC-V.574-5-201508-I!!PDF-E.pdf
IEC 60268-16:2011 Sound system equipment – Part 16: Objective rating of speech intelligibility by speech transmission index
IRAM 4062-1 (2021) Ruidos molestos al vecindario. Parte 1 - Método de medición y calificación en ambientes interiores y en exteriores no linderos con la vía pública
IRAM 4062-1 (2025) Ruidos molestos al vecindario. Parte 1 - Método de medición y calificación en ambientes interiores y en exteriores no linderos con la vía pública
Nielsen Leif (2011-01-12) Personal communication by email.
Kornprobst, Hans-Joachim (2018-01-18) Personal communication by email.
Miyara, Federico (2025) Enfrentando a la ISO: Sobre el uso del sím¬bolo dBA para los niveles sonoros ponderados A. Paper AdAA39. XIX Congreso Argentino de Acústica AdAA 2025.
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