Influence of A weighting methods on heavy weight floor impact sound insulation measurement: Continuous curve and octave band correction

Yo-Han Seong; Sin-Tae Kim; Sung-Gon Yum; Yang-Ki Oh

doi:10.7776/ASK.2025.44.6.709

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2025 Vol.44, Issue 6 Preview Page Next Page

Research Article

Influence of A weighting methods on heavy weight floor impact sound insulation measurement: Continuous curve and octave band correction 중량충격음 차단성능 측정 시 A 가중 적용 방식에 따른 영향 분석: 연속 곡선과 옥타브 밴드 보정 방법

30 November 2025. pp. 709-719

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Abstract

This study analyzed the influence of different A-weighting application methods on the evaluation results of heavy-weight floor impact sound insulation. Field recordings were obtained from eleven apartment units with identical floor structures and layouts. Using these data, three A-weighting approaches were compared and analyzed: the 1/1- and 1/3-octave band correction methods specified in ISO 717-2, and the continuous A-weighting method defined in IEC 61672-1. The results showed that the 1/1-octave band method yielded values approximately 0.8 dB higher than those obtained with the 1/3-octave band method, while the continuous A-weighting method produced results comparable to the 1/3-octave method. However, at the individual receiver–source combination level, deviations of –1.6 dB to 2.7 dB were observed between the 1/3-octave and continuous A-weighting methods. These discrepancies were mainly attributed to the sensitivity at octave-band boundaries; when nonlinear spectral characteristics of heavy-impact sounds were pronounced near the upper or lower frequency limits of the bands, deviations of up to several decibels occurred. In future studies, FFT-based narrowband analysis will be applied to refine the spatial averaging process and to examine the correspondence between continuous A-weighting results and subjective auditory perception.

Keywords

Heavy-weight floor impact sound

A-weighting

Octave band

Band-edge sensitivity

본 연구는 중량충격음 차단성능 측정 과정에서 A-가중 적용 방식의 차이가 평가 결과에 미치는 영향을 분석하였다. 이를 위해 동일한 평면과 바닥 구성층을 갖는 공동주택 11세대에서 측정한 중량충격음 음원을 대상으로, 국제표준 ISO 717-2에서 규정한 1/1 및 1/3 옥타브 밴드 A-가중 보정 방식과 소음계 표준 IEC 61672-1의 연속 A-가중 방식을 적용하여 비교·분석하였다. 분석 결과, 1/1 옥타브 밴드 방식은 1/3 옥타브 밴드 방식에 비해 평균 약 0.8 dB 높게 평가되었으며, 연속 A-가중 방식은 1/3 옥타브 방식과 유사한 수준으로 나타났다. 그러나 개별 수음점–가진점 조합 단위에서는 1/3 옥타브 방식과 연속 A-가중 방식도 –1.6 dB ~ 2.7 dB의 차이를 보였다. 이러한 차이는 주로 주파수 대역 경계에서의 민감성에서 기인하며, 옥타브 대역의 상·하한 주파수 인근에서 중량충격음의 비선형적 주파수 응답이 크게 발생할 경우 최대 약 3 dB의 편차가 발생하는 것으로 분석되었다. 향후 연구에서는 FFT 분석을 기반으로 공간 평균을 협대역 주파수 단위로 처리하는 방법과, 연속 A-가중 방식을 적용하였을 때의 청감적 특성에 대한 정합성을 분석하고자 한다.

키워드

중량충격음

A-가중

옥타브 밴드

밴드 경계 민감도

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 44
No :6
Pages :709-719
Received Date : 2025-09-17
Revised Date : 2025-11-06
Accepted Date : 2025-11-11
DOI :https://doi.org/10.7776/ASK.2025.44.6.709

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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