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Significance and Use
5.1 This standard provides a method to measure the level of sound power generated in a room by impacts on a given floor surface within the same room. The test results could be used to compare the relative sound power of tapping machine impact noise on various finished floor surfaces. The resulting data could be used for comparing relative levels of unwanted noise from footfalls and objects accidentally dropped on the floor.
5.2 The spectrum and level of the sound power produced by floor impacts is determined by:
5.2.1 The mechanical properties of the floor structure, such as its size, construction, surface, mounting or edge restraints, stiffness, or internal damping,
5.2.2 The measured acoustical characteristics of the test room,
5.2.3 The location of the object or device producing the impacts, and
5.2.4 The nature of the impact.
5.3 This test method is based on the use of a standard tapping machine of the type specified in placed in specific positions on the floor. This machine produces a continuous series of uniform impacts at a uniform rate on a test floor and generates broadband sound pressure levels that are sufficiently high to make measurements possible with most floor types even in the presence of background noise. The tapping machine itself, however, is not designed to simulate any one type of impact, such as produced by male or female footsteps.
5.4 Because of its portable design, the tapping machine does not simulate the weight of a human walker. The degree of correlation between the results of tapping machine tests in the laboratory and the subjective acceptance of floors under typical conditions of domestic impact excitation is uncertain. The correlation will depend on both the type of floor construction and the nature of the impact excitation in the building.
5.5 This test method is not intended for field tests.
1.1 This test method covers the laboratory measurement of impact sound radiation from floor structures using a standardized tapping machine. While the finished floor surface is usually the primary factor, it must be noted that the floor structure below the finished floor also plays a major role in the level of noise generated in the source room by impacts to the floor surface. As a result, the report must include a full description of the complete floor structure and its support (for example, perimeter support only, multiple point supports, or full continuous support like a slab on grade). It is assumed that the impact sound generated by the tapping machine in the test room is a good approximation to a diffuse sound field.
1.2 Measurements may be conducted on floor structures of all kinds, including those with floating-floor or suspended ceiling elements, or both, and floor-ceiling assemblies surfaced with any type of floor-surfacing or floor-covering materials.
1.3 This test method prescribes a uniform procedure for reporting laboratory test data in both one-third-octave-band and overall A-weighted sound power levels generated by the tapping machine impacts on the floor structure (test specimen).
1.4 Laboratory Accreditation—The requirements for accrediting a laboratory for performing this test method are given in .
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
C634 Terminology Relating to Building and Environmental Acoustics
E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
E492 Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine
E1007 Test Method for Field Measurement of Tapping Machine Impact Sound Transmission Through Floor-Ceiling Assemblies and Associated Support Structures
E2179 Test Method for Laboratory Measurement of the Effectiveness of Floor Coverings in Reducing Impact Sound Transmission Through Concrete Floors
E2235 Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods
E3091 Specification for Systems to Measure Sound Levels
ANSI StandardsANSI S1.10 ANSI S1.11 Electroacoustics Octave-band and Fractional-octave-band filters ANSI S12.51 AcousticsDetermination of sound power levels of noise sources using sound pressurePrecision methods for reverberation test rooms
IEC StandardsIEC 60942
ISO StandardsISO 140/6 ISO 3741 ISO 6926 AcousticsRequirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ICS Number Code 91.120.20 (Acoustics in building. Sound insulation)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM E3133-18, Standard Test Method for Laboratory Measurement of Floor Impact Sound Radiation Using the Tapping Machine, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top