Insertion loss of personal protective clothing

Biesel, Van; Cunefare, Kenneth A.

doi:10.1016/s0003-682x(00)00078-5

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Some research has looked at some of the factors affecting speech intelligibility, including the altered vocal output of a mask wearer 7,8 and the insertion loss from over-the-head devices such as hoods 9 and hearing protection 10 .…”

Section: Published Researchmentioning

confidence: 99%

Intelligible Measurement 2006

2023

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Section: Published Researchmentioning

confidence: 99%

Intelligible Measurement 2006

2023

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“…Whilst several references are available for assessing the absorption and attenuation in angledependent incidence of known acoustic sources against multiple materials in controlled environments (e.g., reverberation chambers) [66], there are still uncertainties in determining the acoustic attenuation and transfer characteristics of clothes and fabrics in real-life conditions [67]. Laboratory tests have ascertained the effects of fabrics positioned statically between an ambient microphone and a noise source [68] but no extensive results are available for evaluating more complex conditions such as indirect and variable microphone placements, denser material composition and placements (e.g., weaves), presence of multi-layer materials with different acoustic transmission losses. Therefore, we decided to collect contextual data from the additional smartphone sensors (e.g., light sensor, proximity sensor, 3-axis accelerator, etc.)…”

Section: B Measurement Accuracy and Data Qualitymentioning

confidence: 99%

Crowd-sensing our Smart Cities: a Platform for Noise Monitoring and Acoustic Urban Planning

Zappatore

Longo

Bochicchio

2017

JCOMSS

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Environmental pollution and the corresponding control measurements put in place to tackle it play a significant role in determining the actual quality of life in modern cities. Amongst the several pollutant that have to be faced on a daily basis, urban noise represent one of the most widely known for its already ascertained health-related issues. However, no systematic noise management and control activities are performed in the majority of European cities due to a series of limiting factors (e.g., expensive monitoring equipment, few available technician, scarce awareness of the problem in city managers). The recent advances in the Smart City model, which is being progressively adopted in many cities, nowadays offer multiple possibilities to improve the effectiveness in this area. The Mobile Crowd Sensing paradigm allows collecting data streams from smartphone built-in sensors on large geographical scales at no cost and without involving expert data captors, provided that an adequate IT infrastructure has been implemented to manage properly the gathered measurements. In this paper, we present an improved version of a MCS-based platform, named City Soundscape, which allows exploiting any Android-based device as a portable acoustic monitoring station and that offers city managers an effective and straightforward tool for planning Noise Reduction Interventions (NRIs) within their cities. The platform also now offers a new logical microservices architecture.

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“…In particular, acoustic transfer characteristics of the clothing used to collect the raw recordings is not known. Acoustic transmission loss (TL) has been examined generally for fabric positioned in front of a noise source [10][11][12] and in front of a voice, 13,14 but not for wearable recording systems such as the LENA. In general, denser material composition (i.e., weave density) and indirect microphone placement increase amplitude loss at frequencies greater than 1 kHz.…”

Section: Introductionmentioning

confidence: 99%

“…masks have been shown to have increased TL above about 250 Hz. 14 Other factors directly contributing to TL include the relationship between the noise or voice source and the polar response pattern of the microphone and signal interference from external noise or environmental sources.…”

Section: Introductionmentioning

confidence: 99%

Acoustic characteristics of the clothes used for a wearable recording device

VanDam

2014

The Journal of the Acoustical Society of America

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There has been increasing attention in the literature to wearable acoustic recording devices, particularly to examine naturalistic speech in disordered and child populations. Recordings are typically analyzed using automatic procedures that critically depend on the reliability of the collected signal. This work describes the acoustic amplitude response characteristics and the possibility of acoustic transmission loss using several shirts designed for wearable recorders. No difference was observed between the response characteristics of different shirt types or between shirts and the bare-microphone condition. Results are relevant for research, clinical, educational, and home applications in both practical and theoretical terms.

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Insertion loss of personal protective clothing

Cited by 3 publications

References 1 publication

Intelligible Measurement 2006

Intelligible Measurement 2006

Crowd-sensing our Smart Cities: a Platform for Noise Monitoring and Acoustic Urban Planning

Acoustic characteristics of the clothes used for a wearable recording device

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