Technical GuidesA selection of technical documents compiled by NPL Acoustics scientists describing acoustics metrology procedures and techniques.
Air-Borne and Audiological Acoustics
- The Nomenclature for Measurement Microphones
- Sound Measurements
- Interim Document for the Periodic Testing of IEC 61672 Sound Level Meters
- Machinery Noise Guide
- Performance Verification of Complete Acoustical Measurement Systems
- Selection of an Appropriate Calibration Strategy for Acoustic Equipment
Audiometry
Environmental Noise
- Guide to Predictive Modelling for Environmental Noise Assessment
- Speed of Sound in Humid Air interactive
- Calculation of Atmospheric Absorption (ISO9613) interactive
- Wind Turbine Noise Model Interactive interactive
- Calculation of Road Traffic Noise (CRTN) Model Interactive interactive
Acoustic Emission
Underwater Acoustics
- Performance of commercially available hydrophones with temperature
- Performance of commercially available hydrophones with hydrostatic pressure
- Underwater Acoustics Concepts - and some issues associated with their units of measurements interactive
- Calculation of Absorption of Sound in Seawater Interactive
- Speed of Sound in Sea-Water Interactive
- Speed of Sound in Pure Water Interactive
- Hydrophone Electrical Loading Corrections Interactive
- Hydrophone Mounting
- Hydrophone Wetting
- Uncertainties in Free-field Hydrophone Calibration
Medical and Industrial Ultrasonics
- Output Measurements for Medical Ultrasound
(PDF 7.8 MB)
R C Preston (Ed)
Guide - Recommended ultrasound field safety classification for medical diagnostic devices (PDF 329 KB)
R C Preston and A Shaw
NPL Good Practice Guide No 50