---
_id: '14071'
abstract:
- lang: eng
  text: Noise pollution in cities is recognized as a critical environmental threat,
    primarily caused by road traffic and other human activities in areas surrounded
    by sound-reflective infrastructure. Research increasingly highlights the significant
    impact of building design on urban acoustics, as the outer surfaces of façades
    continuously interact with sound propagation. However, unlike interior acoustics,
    there are no regulations or standardized approaches for incorporating sound absorption
    to building exteriors, even in areas where noise levels exceed health recommendations.
    Façades with sound-absorptive properties, such as porous or multilayered materials,
    can achieve significant noise reductions compared to sound-reflective materials,
    which are the most common in cities and often amplify sound levels. This research
    aims to address this gap by presenting a systematic and practical approach to
    quantifying the frequency-based sound absorption coefficients of façades and classifying
    them into sound absorption classes in accordance with ISO 11654:1997. As part
    of this research, a series of practical tools for policymakers and practitioners
    has been developed, enabling the assessment of existing buildings and the design
    of new ones. This study advances progress toward healthier acoustic environments
    through proactive impact detection, sustainable design practices, and the promotion
    of urban resilience.
author:
- first_name: Alvaro
  full_name: Balderrama, Alvaro
  id: '74171'
  last_name: Balderrama
  orcid: 0000-0002-4118-2838
citation:
  ama: Balderrama A. <i>Calculating and Classifying Façade Absorption in Outdoor Environments</i>.
    InterNoise 2025; 2026.
  apa: Balderrama, A. (2026). Calculating and classifying façade absorption in outdoor
    environments. In <i>54th International Congress and Exposition on Noise Control
    Engineering</i>. 54th International Congress &#38; Exposition on Noise Control
    Engineering, Sao Paulo, Brazil. InterNoise 2025.
  bjps: <b>Balderrama A</b> (2026) <i>Calculating and Classifying Façade Absorption
    in Outdoor Environments</i>. InterNoise 2025.
  chicago: Balderrama, Alvaro. <i>Calculating and Classifying Façade Absorption in
    Outdoor Environments</i>. <i>54th International Congress and Exposition on Noise
    Control Engineering</i>. InterNoise 2025, 2026.
  chicago-de: Balderrama, Alvaro. 2026. <i>Calculating and classifying façade absorption
    in outdoor environments</i>. <i>54th International Congress and Exposition on
    Noise Control Engineering</i>. InterNoise 2025.
  din1505-2-1: '<span style="font-variant:small-caps;">Balderrama, Alvaro</span>:
    <i>Calculating and classifying façade absorption in outdoor environments</i> :
    InterNoise 2025, 2026'
  havard: A. Balderrama, Calculating and classifying façade absorption in outdoor
    environments, InterNoise 2025, 2026.
  ieee: A. Balderrama, <i>Calculating and classifying façade absorption in outdoor
    environments</i>. InterNoise 2025, 2026.
  mla: Balderrama, Alvaro. “Calculating and Classifying Façade Absorption in Outdoor
    Environments.” <i>54th International Congress and Exposition on Noise Control
    Engineering</i>, InterNoise 2025, 2026.
  short: A. Balderrama, Calculating and Classifying Façade Absorption in Outdoor Environments,
    InterNoise 2025, 2026.
  ufg: '<b>Balderrama, Alvaro</b>: Calculating and classifying façade absorption in
    outdoor environments, o. O. 2026.'
  van: Balderrama A. Calculating and classifying façade absorption in outdoor environments.
    54th International Congress and Exposition on Noise Control Engineering. InterNoise
    2025; 2026.
conference:
  end_date: 2025-08-27
  location: Sao Paulo, Brazil
  name: 54th International Congress & Exposition on Noise Control Engineering
  start_date: 2025-08-24
date_created: 2026-09-30T10:15:25Z
date_updated: 2026-10-30T08:30:21Z
ddc:
- '620'
department:
- _id: DEP1634
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.researchgate.net/publication/395017253_Calculating_and_classifying_facade_absorption_in_outdoor_environments
oa: '1'
publication: 54th International Congress and Exposition on Noise Control Engineering
publication_identifier:
  eisbn:
  - 978-65-272-1573-8
publication_status: published
publisher: InterNoise 2025
status: public
title: Calculating and classifying façade absorption in outdoor environments
type: conference_editor_article
user_id: '83781'
year: '2026'
...