Noise monitoring

Noise monitoring is usually located in the HASP as part of the monitoring program. Noise monitoring should be performed in accordance with acceptable practices. Typically, noise levels are monitored in the field with either a Type I or Type II sound level meter (SLM). Noise dosimeter readings can also be obtained to determine the percent (%) noise dose. Noise levels and % doses measured are then compared to limits listed in OSHA standard 29 CFR 1910.95, Hearing Conservation [3]. 

Noise monitoring equipment, like air monitoring equipment, should be used, stored, and maintained in aeeordanee with manufaeturer ree-ommendations. Noise instrumentation is typieally ealibrated prior to use for eaeh shift and eheeked at the end of the shift to determine aeeuraey Noise readings also should be reeorded in a log and should beeome part of the permanent site reeord. 

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

Not performing monitoring that is required hy the SSHAP may have potentially serious consequences. For noise monitoring, guidance should he written into the plan that specifies when noise monitoring will he performed. For instance, how should one handle the following situation Let s say you are on site hut you do not have a sound level meter. At what point do you need to monitor One rule of thumb for this situation is as follows if you cannot conduct a normal conversation with fellow employees that are within three feet, you are likely at or above 85dBA. Your plan should state this. And it should state when and if the site would need to have a sound level meter on site. 

If applicable, has the employer implemented a hearing conservation program that includes noise monitoring, use of hearing protection devices, and audiograms [OSHA Reference 1910.95(c)]... 

Electrochemical noise monitoring probes. Electrochemicm noise monitoring is probably the newest of these methods. The method characterizes me naturally occurring fluctuations in current and potential due to the electrochemical kinetics and the mechanism of... 

Electrochemical noise monitoring techniques have been used previously in studies of corrosion processes occurring on metals in a variety of environments. Initially, work was directed towards the monitoring of potential noise fluctua-... 

The current noise signal was monitored by using a sensitive, low noise zero resistance ammeter (ZRA) to couple pairs of identical electrodes the ZRA acting as a current to voltage converter. This derived potential signal was then fed into a potential noise monitor. 

One way to divide the types of electrochemical noise is by the manner in which it is collected. Potential noise refers to measurements of the open circuit potential of an electrode versus either a reference electrode or a nominally identical electrode. While measurements with a conventional reference electrode have the advantage of being relatable to thermodynamic conditions, these reference electrodes have their own noise associated with them that could complicate analysis. In addition, the application of noise monitoring to field conditions would be... 

Quest manufactures noise-monitoring equipment, including octave band analyzers, dosimeters, and sound-level meters. 

Various methods of on-line reactor surveillance have been used, including neutron noise monitoring in boiling water reactors (BWRs) to detect internals vibration, and pressure noise surveillance at TMI-2 to monitor primary loop degasification. On-line surveillance data has been used in the assessment of loose thermal shields. 

Have noise-monitoring evaluations been completed Have signs been posted where noise levels excess 85dB Are ear-plugs available near areas exceeding 85 dB ... 

There are plans in all countries to develop and introduce diagnostic systems for leak detection, vibration monitoring and noise monitoring. 

The purpose of the noise section is to provide protection against the effects of noise exposure through noise monitoring, audiometric testing, determination of threshold shifts, hearing protection, employee training, and record keeping. Determination of the dBA should be computed in adherence to 1910.95 Appendix A—Noise Exposure Computation. 

Employees are responsible for wearing hearing protective devices as established by facility noise monitoring results, and reporting any problems with the use of hearing protective devices to appropriate supervision. Employees shall also be responsible for reporting for audiometric testing when notified. 

The employer must design and implement workplace noise monitoring. 

The number of industrial applications of electrochemical noise monitoring has grown significantly in recent years, yet skepticism about the universal usefulness of this technique is still encountered. It has been shown to be well suited to monitoring under thin moisture film conditions, such as those encountered in flue gas condensation and atmospheric corrosion. Present concerns and controversy are mainly related to the validity of corrosion rates derived from noise records. 

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