Lô 10, KCN Lại Yên, Hoài Đức, Hà Nội

ISO 11546-1:1995 – Acoustics — Determination of sound insulation performances of enclosures — Part 1: Measurements under laboratory conditions (for declaration purposes)

Tiêu chuẩn ISO

1 Scope This part of ISO 11546 specifies laboratory methods for the determination of the sound insulation performance (insertion loss) of small machine enclosures. It applies to a total enclosure only and not to the individual panels from which the enclosure is made. NOTES 1 Sound insulation for enclosure panels such as wall elements, doors, […]

ISO 11546-1:1995 – Acoustics — Determination of sound insulation performances of enclosures — Part 1: Measurements under laboratory conditions (for declaration purposes)

Tiêu chuẩn ISO

1. Scope This part of ISO 11546 specifies laboratory methods for the determination of the sound insulation performance (insertion loss) of small machine enclosures. It applies to a total enclosure only and not to the individual panels from which the enclosure is made. NOTES 1 Sound insulation for enclosure panels such as wall elements, doors, […]

TCVN 7839 – 1 : 2007 – Âm học – xác định hiệu quả cách âm của vỏ cách âm – phần 1: phép đo ở điều kiện phòng thí nghiệm (để công bố kết quả)

logo-Tiêu chuẩn quốc gia TCVN

Tiêu chuẩn này quy định các phương pháp trong phòng thí nghiệm để xác định hiệu quả cách âm (độ suy giảm âm) của vỏ cách âm đối với các máy nhỏ. Tiêu chuẩn này không áp dụng cho từng phần cấu tạo nên vỏ cách âm mà chỉ áp dụng cho toàn bộ vỏ […]

ISO 1996-2:2017 – Acoustics — Description, measurement and assessment of environmental noise — Part 2: Determination of sound pressure levels

Tiêu chuẩn ISO

Introduction Measurements of environmental noise are complicated because there is a great number of variables to consider when planning and performing the measurements. As each measurement occasion is subject to current source and meteorological conditions which cannot be controlled by the operator, it is often not possible to control the resulting uncertainty of the measurements. […]

ISO 9612:2009 – Acoustics — Determination of occupational noise exposure — Engineering method

Tiêu chuẩn ISO

Introduction This International Standard provides a stepwise approach to the determination of occupational noise exposure from noise level measurements. The procedure contains the following major steps: work analysis, selection of measurement strategy, measurements, error handling and uncertainty evaluations, calculations, and presentation of results. This International Standard specifies three different measurement strategies: task-based measurement; job-based measurement; […]

ISO 7235:2003 – Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units — Insertion loss, flow noise and total pressure loss

Tiêu chuẩn ISO

Introduction This International Standard specifies the substitution method for determining the insertion loss of ducted silencers and a method for determining the transmission loss of air-terminal units. In the substitution method, the sound pressure level of the transmitted wave is first determined for the test object and then when the test object has been replaced […]