Estimation of noise levels and hpd attenuation in the workplace using microphones located in the vicinity of the ear
AbstractNoise levels and hearing protection devices (HPD) attenuation were estimated in the workplace using microphones located in the vicinity of the ear. In the first part of the study, tests were conducted in a diffuse field in a reverberant room and in a free field in a semi-anechoic room on 4 subjects with 5 different earmuffs and without earmuffs. In the second part of the study, a controlled simulation of a workplace environment was performed to validate the approximation. The objective was to create a sound field which could be more directional at certain location. The regression lines can be used to correct the earmuff microphone readings as long the source location can be determined. While a difference of 0 dB represents the target to achieve, it is found that applying the proposed correction allows to obtain a reasonable estimate within a ∓2 dB range.
Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i) to publish, reproduce, distribute, display and store the Contribution;
ii) to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii) to exploit all subsidiary rights in the Contribution,
iv) to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v) to licence any third party to do any or all of the above.