Survey noise

The site safety plan indieated, however, that noise monitoring was required, but neither area noise surveys nor personnel dosimetry had been eondueted. 

Complete successfully the post-construction noise survey. Complete "as-built" drawings and submit them to the Owner. Submit to the Owner copies of all engineering calculations and vendors information. 

Crighton, D.G. 1977. Orderly structure as a source of jet exhaust noise Survey lecture. In Structure and mecJianisnis of turbulence II. Ed. H. Fiedler. Lecture notes in physics. Berlin Springer-Verlag 76 154-70. 

Conducting a new noise survey in the employee s work area to determine if engineering controls are sufficient... 

Guidance Note EH 14, Level of training for technicians making noise surveys... 

There are many options for modifying a sound source. Analysis of a sound source will determine which options are feasible, practical, and economical. Because many control options are frequency dependent, one must conduct a noise survey of an environment and the sources within it to help define the problem and potential solutions. Normally, noise survey data will give records of total sound level and sound levels for each octave band. 

The only way to determine whether noise exceeds an exposure standard is to make measurements. A noise survey is a procedure for collecting noise in some space. There are two kinds of surveys. The intent of one kind is to establish whether an individual has an exposure that exceeds some standard. Noise dosimeters handle this kind of survey very well. They move with a wearer during the work day and capture the exposure data. 

Asbestos-exposure limits and measurement of airborne dust concentrations Arsine - health and safety precautions Stibine - health and safety precautions Bery 11 ium — health and safety precautions Level of trainirtg for technicians making noise surveys Threshold limit values (superseded by EH 40)... 

A good example is noise testing. Due to legislative requirements in some jurisdictions, a noise survey is required every five years in particular woikplaces. In addition to this, the noise survey must be carried out by a competent person who m also need to be accredited. 

If we consider initially the possible limitations of a noise survey, the following variables need to be considered ... 

When the results of a noise survey have been collated, noise areas in excess of the required standard, 85 dB(A) for example, should be the target of control strategies. There will, however, be a percentage of the population that will receive hearing damage from noise levels below 85 dB(A). 

Conducting a noise survey Calibrating and using a sound pressure level meter... 

Using the information given in the preceding material you can draw up an action plan to carry out and report on a noise survey in a workplace. Include in your action plan ... 

Noisy machinery should be fitted with silencers. When machinery is used in a workshop (such as woodworking machines), a noise survey should be undertaken and, if the noise levels exceed the second action level, the use of ear defenders becomes mandatory. If it is necessary to shout when talking to a nearby colleague, then the noise level is excessive and ear defenders should be worn. 

The HSE Guidance on the Noise Regulations, L108, offers some very useful advice on the implementation of the Regulations and should be read by anyone who suspects that they have a noise problem at work. The guidance covers equipment and procedures for noise surveys and contains a noise exposure ready-reckoner which can be used to evaluate /-EP,d when the noise occurs during several short intervals and/or at several different levels during the 8-hour period. 

Has a Noise Survey been considered and a Noise Compliance Plan prepared, if required ... 

Where employees are likely to be exposed to noise levels at or above the lower exposure action value, the employer must ensure that a noise survey is carried out by a competent person (reg. 4). Records of this assessment must be kept (reg. 5). In some cases the level of noise to which an employee is exposed varies considerably over the duration of a shift making it difficult to assess the exposme from a single or a few spot measurements. The use of a dosimeter will enable a single figure to be derived for a shift. The dosimeter is worn with the microphone close to the ear for the period of the shift and the results either read directly from the instrument or downloaded to a computer. When using the dosimeter it is important that the wearer works to his or her normal pattern and does not spend longer than normal periods in a noisy environment. Where a noise risk has been identified there is a requirement on the employer to reduce the emission to the lowest reasonably practicable level (reg. 6). 

Has an initial background noise survey been carried out (where necessary) ... 

The Regulations introduced a control framework by requiring assessment of the extent of the problem, by carrying out noise surveys to identify work areas and employees at risk control by engineering measures, isolation or segregation of affected employees supply and use of protective equipment and administrative means and monitoring by reassessment at intervals to ensure that the controls used remain effective. 

Ultrasonic detectors should be calibrated according to an ultrasonic noise survey of the area in which they are installed, in accordance with vendor recommendations. 

Although the NLNM was constructed from the records of land-based seismometers, it may also represent a hypothetical quietest site under the sea. Seismic noise surveys on the ocean bottom have not yet been undertaken on the scale that they have been on land. It is clear from the work which has been done so far, however, that the noise levels are generally significantly higher. Most of the ocean floor is covered with sediment which is more compliant than sediment on land, and seismic velocities are lower. Seafloor compliance means that excess site noise due to deformation and tilt can result from both variations in pressure due to waves at the surface and currents traveling along the bottom of the ocean (Webb and Crawford 2010). When precautions are taken to mitigate these effects, site noise can approach the levels observed on land. 

The hazard assessment can confuse some employers. What is needed is to evaluate prior OSHA 200 logs and injury reports, minutes of safety meetings, and any air or noise surveys. This should be followed by a thorough walk-through of the warehouse to look for ... 

Sound source location. Diuing two noise surveys the sound power levels from two different designs of lube oil console were meastued using the sotuid intensity meter. The overall sound power levels were 93 dB(A) and 109 dB(A). The two consoles had electrically driven pumps and both emitted strong tonal noise. In the first case the tonal noise was centered on 8 kHz using the sound intensity probe it was possible to home in on the piunp suction pipe as a major noise source. This was confirmed by vibration velocity measiuements. 

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