Airborne Sound Immission Calculations during Offshore Pile Driving Arklow Bank OWF

Measurement procedures for underwater sound sources associated with oil and gas exploration and production activities

This report is the result of Phase 2 of a two-phase project for the standardization of measurement, processing and reporting procedures for offshore oil and gas exploration and production-related sound sources. This project was carried out for the Sound and Marine Life Joint Industry Programme of the International Association of Oil & Gas...

Measurement procedures for underwater sound sources associated with oil and gas exploration and production activities.

This report is the result of Phase 2 of a two-phase project for the standardization of measurement, processing and reporting procedures for offshore oil and gas exploration and production-related sound sources. This project was carried out for the E&P Sound and Marine Life Joint Industry Programme of the International Association of Oil & Gas...

Vector sensors and acoustic calibration procedures

The measurement of underwater sound for the purpose of environmental impact studies usually only involves the measurement of the sound pressure by hydrophones. Sea mammals are sensitive to sound pressure in water like land mammals are for sound pressure in air. However, some species of fish and invertebrates are also sensitive and responsive to...

Assessment of measurement-based methods for separating wheel and track contributions to railway rolling noise

The noise produced during a train pass-by originates from several different sources such as propulsion noise, noise from auxiliary equipment, aerodynamic noise and rolling noise. The rolling noise is radiated by the wheels and the track and is excited by the wheel and rail unevenness, usually referred to as roughness. The current TSI Noise...

Modelling propagation of sound emitted by mini-airguns

A modelling approach is described in which time-domain underwater-acoustic source functions are generated using a model that predicts the motion of air-bubbles generated by mini-airguns operated at various pressures. These time-series are Fourier-transformed to produce frequency-domain descriptions of the source. These are combined with complex...

Experimental assessment of underwater acoustic source levels of different ship types

Thecontributionofshippingnoisetothebackground noise in the seas can be estimated by shipping noise maps. Noise maps can be made by applying appropriate modeling tools for underwater sound propagation and ship source levels to information on the acoustic environment and on the ship traffic in the area of the map. The development of reliable source...

The effect of floating deck structures on underwater radiated noise

A concept for underwater machinery noise mitigation of future civil and military ships is the application of a common deck structure, supporting multiple machines, which is installed on resilient mounts on the ship's foundation structure. TNO is addressing the availability and testing of tools to be able to set realistic targets for the radiated...

Transposition of Noise Type Test Data for Tracks and Vehicles

New railway vehicles in Europe have to comply with noise limits as defined in the Technical Specification for Interoperability (TSI). The pass-by test has to be carried out at a site that fulfills the TSI requirements. The need has arisen to be able to perform TSI pass-by type testing at non-compliant sites. In the ACOUTRAIN project, procedures...

Experimental Assessment of Underwater Radiated Sound of Different Ship Types

The aim of the SONIC project is to develop tools to investigate and mitigate the effects of underwater noise generated by shipping. One way to study the contribution of shipping noise to the background noise in the seas is to produce shipping noise maps. The SONIC project delivers the required technical knowledge for noise mapping, based on a...

Proposals for Improved Measurement Methods for Curve Squeal and Braking Noise

Improved methods for measuring curve squeal and braking noise have been proposed within the ACOUTRAIN project, intended as input to future standards. In this paper an outline of these methods is given and the underlying considerations are explained. The EU TSI regulation limiting noise emission of new rail vehicles does not yet specify limits...

Transposition of Noise Type Test Data for Tracks and Vehicles

New railway vehicles in Europe have to comply with noise limits as defined in the Technical Specification for Interoperability (TSI). The pass-by test has to be carried out at a site that fulfills with TSI requirements. The need has arisen to be able to perform TSI pass-by type testing at non-compliant sites. In the ACOUTRAIN project, procedures...

Proposals for improved measurement methods for curve squeal and braking noise

Improved methods for measuring curve squeal and braking noise have been proposed within the ACOUTRAIN project, intended as input to future standards. In this paper an outline of these methods is given and the underlying considerations are explained. The EU TSI regulation limiting noise emission of new rail vehicles does not yet specify limits...

Separation of rolling noise and aerodynamic noise by in-service measurement of combined roughness and transfer functions on a high speed slab track

Combined sound and vibration measurements during train pass-bys can be used to quantify contributions from the excitation and transmission of rolling noise. This is useful for the identification of sound sources and the assessment of the track contribution. In this paper, a practical application on a high-speed track is discussed. Acoustic...

Experimental assessment of the insertion loss of an underwater noise mitigation screen for marine pile driving

Because of the concern about potential effects on marine pile driving, the industry is developing silent marine pile driving concepts. One of the new concepts, which has been engineered by IHC Hydrohammer in the Netherlands, is the application of a steel Noise Mitigation Screen (NMS) around the pile with the option of an additional confined air...

Evaluation of the interim measurement protocol for railway noise source description

The Dutch national calculation scheme for railway noise has been declared the default interim method for railway noise calculation by the EU, until the introduction of results from the Harmonoise project. It includes a measurement protocol for determining emission input data in the format suitable for the present calculation scheme. The...

Geluidaspecten bij warmtekrachtinstallaties

Het plaatsen van een warmtekrachtinstallatie in de gebouwde omgeving kan geluidhinder opleveren. Daarom moeten geluidaspecten nadrukkelijk binnen het installatieontwerp aan de orde komen. Na een algemene inleiding zal dit artikel zich vooral richten op de overdracht van constructiegeluid bij motor-generator opstellingen.

Het rapport Woningwaardering en de kritiek