A5102813840- Hearing Loss and Rehabilitation
- Acoustic Wave Phenomena Research
- Ear Surgery and Otitis Media
- Speech and Audio Processing
- Ultrasonics and Acoustic Wave Propagation
- Reconstructive Facial Surgery Techniques
- Noise Effects and Management
- Structural Health Monitoring Techniques
- Nasal Surgery and Airway Studies
- Voice and Speech Disorders
- Temporomandibular Joint Disorders
- Vibration and Dynamic Analysis
- BIM and Construction Integration
- Music Technology and Sound Studies
- Accounting and Organizational Management
- Innovations in Concrete and Construction Materials
- Architecture and Computational Design
- Management Theory and Practice
- Psychology of Social Influence
- Vehicle Noise and Vibration Control
- Gaze Tracking and Assistive Technology
- Multisensory perception and integration
- Hearing, Cochlea, Tinnitus, Genetics
- Ultrasound Imaging and Elastography
- Structural Analysis of Composite Materials
École de Technologie Supérieure
2017-2024
Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail
2023
The objective occlusion effect induced by bone-conducted stimulation refers to the low frequency acoustic pressure increase that results from occluding ear canal opening. This phenomenon is commonly interpreted as follows: sound “leaks” through earcanal opening and “trapped” device. instinctive interpretation misrepresents fundamental mechanism of related impedance already highlighted existing electro-acoustic models. However, these models simplify wall vibration (i.e., origin phenomenon) a...
Abstract Passive earplugs are used to prevent workers from noise-induced hearing loss. However, often induce an acoustic discomfort known as the occlusion effect. This phenomenon corresponds increased auditory perception of bone-conducted part physiological noises at low-frequency and is associated with augmentation pressure in occluded earcanal. In this work, we report a new concept passive for mitigating effect between 100 Hz 1 kHz. The strategy consists reducing input impedance earplug...
The use of passive earplugs is often associated with the occlusion effect: a phenomenon described as increased auditory perception one's own physiological noise at low frequencies. As notable acoustic discomfort, effect penalizes and efficiency earplugs. This objectively characterized by increase in sound pressure level occluded ear canal compared to open canal. Taking inspiration from metamaterials, new design three-dimensional printed "meta-earplug," made four Helmholtz resonators arranged...
The use of earplugs is commonly associated with an increased perception the bone-conducted part one's own physiological noise. This phenomenon referred to as occlusion effect and most prominent at low frequencies. Several factors influence effect, such ear anatomy; stimulation; type device its fit, insertion depth, material properties. latter factor great interest potentially reduce passive earplugs. paper investigates mechanism(s) contribution objective effect. A two-dimensional...
This paper proposes a quick and straightforward technique for estimating the insertion loss (IL) of earplugs measured on an acoustical test fixture (ATF) using commercial impedance tube. In this method, earplug's acoustic properties (i.e., its transmission reflection coefficient medial surface) are determined from transfer matrix three-microphones tube method modified here current application. The IL is then estimated one-dimensional analytical model open occluded earcanals based wavefield...
The occlusion effect is commonly experienced by in-ear device wearers as an increased loudness sensation of bone-conducted low frequency sounds. A widespread theory proposed Tonndorf and based on a simplified electro-acoustic model describes the phenomenon removal open earcanal high-pass filter due to perfect or partial occlusion. However, this has not been clearly defined several ambiguities remain. Revisiting model, second order for volume velocity transferred between wall eardrum...
Earplugs are commonly used to prevent noise-induced hearing loss. However, their effectiveness is often hindered by the discomfort they cause, impacting consistent and correct use. An important acoustical discomfort, known as occlusion effect, arises from an increased perception of bone-conducted physiological sounds (such one's own voice, breathing, chewing) when ear canal occluded. To objectively assess this study proposes use test fixture (ATF) that avoids direct measurements on human...
Passive earplugs are commonly used to reduce workers' exposure excessively high noise levels. Yet, they associated with various discomforts of diverse origins (e.g., acoustic, physical, functional, or psychological). The occlusion effect, characterized by an increased perception physiological sounds transmitted through bone conduction the cochlea, presents a challenge, leading acoustic discomfort, especially at low frequencies (0.1 1 kHz) and for shallow moderate insertion depths earplug....
The use of earplugs is commonly associated with an amplification low frequency physiological noises in the earcanal referred to as occlusion effect. In literature, type earplug has been shown significantly influence effect particular when inserted deeply enough. However, few studies have investigated physical mechanisms that rule contribution. Their understanding necessary ultimately act on reduce Classical lumped element models usually simplify impedance connected cavity. Intricate...
The occlusion effect (OE) refers to the phenomenon that more bone-conducted physiological sounds are transmitted into earcanal when it is blocked and may cause discomfort on users of hearing protection devices. Models have been proposed study OE as they can help understand physical mechanisms be used evaluate individual contribution factors affect (i.e., device, ear anatomy, stimulation). existing finite element models developed limited by their truncated geometries. In order progress in...
L’enseignement de la statistique s’avère particulièrement difficile auprès des étudiants d’école management. En effet, les cours sont souvent perçus comme secondaires par rapport à disciplines telles que finance ou le marketing. A cela s'ajoutent a priori négatifs envers : certains n’aiment tout simplement pas matière pensent qu’ils auront difficultés comprendre, d’autres jugent inutile ne veulent faire l’effort d’investissement nécessaire. L’attitude développée élèves va ainsi exercer un...
The occlusion effect refers to the increased perception, mainly at low frequencies, of bone-conducted sounds like physiological noises and one's own voice when one wears hearing protection devices. This phenomenon may lead an acoustic discomfort subsequently less effective protection. It can be quantified by objective indicator defined as difference between sound pressure level in open occluded earcanal. Several finite-element models based on truncated outer ears are available literature for...
Passive earmuffs are commonly used when the sound level cannot be reduced at source. They mainly characterized by their attenuation that can either measured or simulated. In this work, of a commercial earmuff is calculated using finite element model from 100 Hz to 5 kHz. Emphasis put on foam-filled cushion which trickiest component because its physical complexity. This multiphasic modeled in simplified way as an equivalent solid, isotropic transverse order take into account added stiffness...