GB/T 19889.7-2022 in English

VALID

Acoustics—Measurement of sound insulation in buildings and of building elements—Part 7 : Field measurement of impact sound insulation

Issued on:2022-07-11
Implemented on:2023-02-01
File Format:PDF
Delivery:Via email within 5 business days

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Standard No:	GB/T 19889.7-2022
Document status:	VALID
Title in English:	Acoustics—Measurement of sound insulation in buildings and of building elements—Part 7 : Field measurement of impact sound insulation
Title in Chinese:	声学建筑和建筑构件隔声测量第7部分：撞击声隔声的现场测量
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2022-07-11
Implemented on:	2023-02-01
Superseding:	GB/T 19889.7-2005 Acoustics. Measurement of sound insulation in buildings and of building elements. Part 7: Field measurements of impact sound insulation of floors
ICS Classification:	91.120.20-Acoustics in building. Sound insulation.
Chinese Classification:	A59-Acoustic Measurement
Professional Classification:	GB-National Standard
Related Keywords:	building acoustics measurement acoustics measurement measurement position spacing≥0.7m mechanized movement continuous measurement field measurement low-frequency measurement
Related Topics:	acoustic standard Acoustic+ Standard test impactor Building Acoustic Analyzer impactor use Building Equipment Acoustics every other Building Equipment Acoustics Acoustic Test Software Test Acoustic Software sound insulation GBT19889.7 GB/T 19889.7-2005 GB/T 19889.7-2022 Architecture and Building Components Sound insulation measurement of buildings and building elements Acoustics Measurement of sound insulation of buildings and building components iosarchitectural acoustics Building sound insulation measurement specifications download Sound insulation test standard number Stadium architectural acoustics technology Vibroacoustic testing of building structures

《GB/T 19889.7-2022声学建筑和建筑构件隔声测量第7部分：撞击声隔声的现场测量》由TC17（全国声学标准化技术委员会）归口，主管部门为中国科学院。

Introduction

Analysis of the core content of the standard

GB/T 19889.7-2022 is an important standard for building acoustics measurement. It replaces the 2005 version and integrates the relevant content of GB/T 19889.14-2010. The standard specifies the method of measuring the sound insulation performance of floor impact sound in the frequency range of 50Hz-5000Hz using two excitation sources: impactor and rubber ball.

Key Technology Updates

Expanded Measurement Range: Added rubber ball as a heavy and soft impact sound source, and improved the assessment of daily noise such as barefoot walking
Enhanced low-frequency measurement: For rooms with a volume of less than 25m³, it is required to add 50/63/80Hz corner sound pressure level measurement
Detailed Operation Specifications: It is clearly stated that when measurement personnel are present, they must maintain a distance of ≥1 arm's length from the microphone

Measurement Equipment and Calibration Requirements

Equipment Type

Standard Basis

Calibration Period

Sound Pressure Level Measurement System

GB/T 3785.1

Key Points for Implementation of Field Measurement

Specialization of Impact Source Arrangement

For impactor: At least 4 positions shall be randomly distributed, ≥0.5m from the floor boundary, and the hammer connection line shall be at a 45° angle to the beam. Soft surface layers shall adopt the special requirements of Appendix A.

For rubber ball: free fall from a height of 100cm±1cm, the lightweight floor must include the top and center points of the joists.

Comparison of Microphone Arrangement Schemes

Measurement Method	Applicable Scenarios	Minimum Spacing
Fixed Microphone	Unattended Measurement	Position Spacing≥0.7m
Mechanized Movement	Continuous Measurement in Large Spaces	Scanning Radius≥0.7m
Manual Scanning	Confined Space Measurement	Path Inclination≥10°

Special Requirements for Low-Frequency Band Measurements

When the volume of the receiving room is less than 25m³, the following additional measurements are required based on conventional measurements:

Use fixed microphones to measure at least 4 corners (2 on the ground/2 on the ceiling)
The microphone should be 0.3-0.4m away from the boundary of each corner
Calculate the low-frequency average sound pressure level according to the formula L_i,LF=10lg[(10^0.1L_i+2×10^0.1L_i)/3]

Note: For reverberation time measurement, a 63Hz octave filter is used to improve the measurement accuracy of small rooms.

Result Expression and Uncertainty

The test report must include:

1/3 octave spectrum curve (5mm/octave, 20mm/10dB ratio)
Single value evaluation quantity (calculated according to GB/T 50121)
Background noise limit statement (when the signal-to-noise ratio ≤6dB)
Measurement uncertainty assessment (according to GB/T 19889.2)

More samples: DL/T 5154-2012 JGJ 94-2008 QC/T 942-2021

Sample only — not a preview of GB/T 19889.7-2022

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