Topics

Frequency weighting appropriate for hearing at low levels.

Installations which are situated above ground level and, in accordance with Section 2(15) of the AwSV, have no underground components.

Attenuation of airborne or waterborne sound through friction losses.

Sensors for measuring acceleration.

A sensor used to measure the vibration acceleration of a structure. Depending on the respective measurement task, accelerometers with different sensitivities, as well as single-axis or triaxial variants, are used.  …

An acoustic test to determine whether the requirements of the acoustic specification are being met.

An acceptance test in the context of emission measurement refers to the specific testing and measurement of pollutants emitted from a plant or system before the system is put into operation or officially accepted.…

The accreditation according to ISO/IEC 17025 is an international standard that specifies the requirements for testing and calibration laboratories. In Germany, accreditation is provided by DAkkS, the ‘German…

By arranging a large number of individual microphones and processing the resulting signals, the acoustic camera enables the localisation of individual noise sources. Acoustic cameras can be used in industrial plants…

Airborne noise: calculated estimate of the expected sound pressure levels in different areas (rooms, decks) of a ship. Waterborne noise: calculated estimate of the radiated waterborne noise.

Measuring probe consisting of one or more microphones and preamplifiers as well as a specially developed windscreen for performing acoustic measurements in hot and high-flow environments, such as exhaust ducts of…

Acoustic-induced vibrations that occur, for example, in control valve pipes and can potentially cause damage to the pipe system.

Acoustic management involves quality assurance measures designed to systematically monitor and ensure compliance with defined acoustic requirements and target values.

Monitoring of acoustic conditions of machines and systems (ships) using acoustic measurements.

Defined target values for technical noise sources. Requirements may arise, for example, from noise immission control (including noise immission forecasts and planning approval notices), workplace noise protection or…

Maximum emission levels (Le,max and Le,max octave levels) and permissible immission levels are specified in approval notices, which are determined, amongst other things, on the basis of a noise immission forecast…

Temporal and spectral characteristics of the sound emitted by ships and submarines. Used for detection and classification.

Numerical methods for calculating sound radiation, sound propagation etc.

Contractual stipulation of the requirements for the acoustic properties of a ship.

The Act on Protection against Aircraft Noise ensures the protection of the general public and local residents from unacceptably high levels of aircraft noise in the vicinity of airports through building use…

Action management is the systematic process of planning, implementing, monitoring and controlling tasks in order to achieve business objectives, resolve issues (e.g. arising from audits or customer complaints) and…

Proposed action plan based on noise impacts (case-by-case distinctions depending on the impact), assessment of possible noise control measures for construction sites, noise abatement plan, protective brief. …

Elastic mounting of sensitive equipment to reduce the vibration amplitudes introduced (-> vibration foundation). Passive systems are unregulated. Active systems require control electronics. They can also be designed…

The harmful effect of a substance that can occur after a single or repeated short-term exposure (oral, inhalation, dermal) within a short period of time. It is often expressed as the lethal dose (LD50) at which 50…

Measurement of inhalation exposure: dusts, metals, binding agents.

Assessment of existing installations, forecasting as part of the planning process (e.g. petrol station signage).

Aeroacoustic noise is caused by the airflow around the vehicle and its external components. It usually only becomes noticeable at higher speeds (> 200 km/h), significantly exceeding the share of rolling noise.…

Flow-induced vibrations.

Areas of filling or transhipment facilities as defined in Section 2(18) of the AwSV which, in the event of an operational fault during the filling or transhipment of water-polluting substances, may be exposed to…

Air as an object of protection refers to the preservation and protection of air quality in the environment. Air as a resource is vital for the health of humans, animals and plants, as well as for the entire…

Carrying out accredited and notified ambient air quality measurements (outdoor air measurements).

Air pollutants are harmful substances in the air that can affect both human health and the environment.

Air pollutants are particles or gases that can have a negative impact on both human health and the environment. These are mainly released through the operation of industrial, commercial and agricultural facilities,…

Carrying out long-term and short-term measurements.

Air pollution refers to the contamination of the air by various pollutants, which mainly result from human activities.

Air pollution indicators characterise the level of pollution caused by an air pollutant. When considering pollution levels, a distinction must be made between pre-existing pollution, total additional pollution,…

Carrying out immission measurements to determine the air quality.

Monitoring air quality through ambient air quality measurements.

In an air quality assessment the emissions and immissions of air pollutants and odours associated with a project (e.g. the approval of a plant, the adoption of a local development plan, or the planning approval of a…

Air quality measurements to assess air quality.

Carrying out immission measurements to determine the air quality.

Air quality measurements to assess air quality.

Carrying out accredited and notified environmental monitoring (outdoor air quality monitoring).

Monitoring air quality through ambient air quality measurements.

An air quality plan is an instrument for regional air pollution control and is intended, particularly in conurbations, to ensure that the limit values for air pollutants set by the European Union can be met. …

The speed at which air flows.

Noise in the vehicle interior can generally be caused by airborne noise contributions and/or structure-borne noise contributions. Airborne noise contributions are caused by airborne noise sources located either…

Sound that propagates through the air. It is transmitted as a fluctuation in air pressure and perceived by the human ear.

See also “insulation”. Airborne sound insulation refers to the ability to block airborne sound. It is a measure of the airborne sound reduction provided by a building element between two rooms. …

Data from the official real estate cadastre.

At the workplace, a distinction is made between alveolar and inhalable dust fractions.

Carrying out accredited and notified ambient air quality monitoring (outdoor air measurements).

An anechoic chamber is a special acoustic laboratory room in which the walls, floor and ceiling are designed in such a way that virtually no sound reflections occur. It is also known as an echo-free chamber. Due to…

A room in which the walls, ceiling and, where applicable, the floor are designed to minimise sound reflection as much as possible.

The angle-dependent contrast describes how the contrast of a display changes when viewed from different angles.

Subjective perception of the annoyance caused by a sound; an index derived from the interaction of psychoacoustic parameters.

The applicability of the Hazardous Incident Regulation must be assessed on the basis of the quantities of hazardous substances that are or may be present in a facility. The Hazardous Incident Regulation applies if…

The so-called appropriate safety distance is the recommended distance for operating areas, taking into account detailed knowledge, which can be determined on the basis of the substances handled in accordance with…

Software from the company ESRI for importing, processing, preparing, displaying and exporting geodata.

Arsenic is toxic and exhibits metallic or non-metallic properties depending on its form. It rarely occurs in its elemental form but is usually found in combination with other substances.

A replica of the upper half of the human body with specific microphone positions in the ear canal.

Asbestos was used in buildings until around 1995. Asbestos can be detected using scanning electron microscopy (Asbestos analysis).

The ATEX Product Directive (2014/34/EU) is an EU regulation that specifies the requirements for equipment and protective systems used in potentially explosive atmospheres.

The amplitude of a vibration is reduced by converting vibrational energy into thermal energy.

The AUSTAL programme is the reference implementation for applying the revised version of TA Luft (Technical Instructions on Air Quality Control) with regard to propagation calculations and is provided by the Federal…

Software from the Federal Environment Agency for processing and visualising the results of propagation calculations in accordance with TA Luft (AUSTAL).

Software for creating technical drawings.

The spatially and temporally averaged (internal) sound pressure level on all accessible levels of the room or hall, assuming that there is a reverberation field within the room.

Regulation on facilities for handling substances hazardous to water for the protection of waters against adverse changes in their properties due to the release of substances hazardous to water. …