4,257 results match your criteria Impedance Audiometry


Audiological Findings in Children with PLA2G6-associated neurodegeneration.

J Am Acad Audiol 2022 Jun 15. Epub 2022 Jun 15.

Paediatric Neurologist The Children's Hospital at Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia, The Children's Hospital at Westmead Clinical School, Sydney, Australia.

Audiological manifestations of patients with PLA2G6 associated neurodegeneration (PLAN) are limited. We analyzed the audiological findings in a cohort of 13 children with infantile neuroaxonal dystrophy (INAD). Patients underwent a battery of audiological tests including tympanometry, distortion product otoacoustic emissions, impedance audiometry and Brainstem Auditory Evoked Potentials (BAEP's). Read More

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Development and Applications of a Pressurized Water-Filled Impedance Tube.

Sensors (Basel) 2022 May 18;22(10). Epub 2022 May 18.

Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan 70101, Taiwan.

In this study, a pressurized, water-filled impedance tube (WFIT) was developed to measure the reflection coefficients of sound-absorbing materials under various hydrostatic pressures. The developed WFIT was calibrated using a two-microphone, three-parameter calibration method (3PCM). The accuracy and repeatability of the measured reflection coefficients for the water-air interface in the WFIT were determined by comparing these coefficients with corresponding theoretical reflection coefficients. Read More

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A Non-invasive Method to Assess Tensor Tympani Muscle Contraction in Response to Tactile Stimulation.

J Int Adv Otol 2022 May;18(3):214-218

Department of Otolaryngology, İstanbul Medipol University Faculty of Medicine, İstanbul, Turkey.

Background: The function of the tensor tympani muscle and its effects, as well as a universal testing procedure, is not yet known. The purpose of this study is to investigate the effect of tactile stimulation on the tensor tympani muscle activity in an attempt to evaluate the functional status of the muscle.

Methods: In this study, 20 healthy adults aged between 18 and 30 years were included. Read More

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Evaluating the inclusion of tympanometry in population-based surveys of hearing loss.

J Laryngol Otol 2022 May 24:1-9. Epub 2022 May 24.

International Centre for Evidence in Disability, London School of Hygiene and Tropical Medicine, London, UK.

Objective: This study aimed to determine the implications of including tympanometry in the Rapid Assessment of Hearing Loss survey protocol. A comparative study design was employed, with findings from otoscopy compared with the results of tympanometry.

Method: A population-based survey of the prevalence and causes of hearing loss among adults aged over 35 years in The Gambia was conducted. Read More

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Eustachian tube insufflation with thermal water: Effectiveness in the treatment of pediatric otitis media with effusion.

Am J Otolaryngol 2022 Jul-Aug;43(4):103504. Epub 2022 May 16.

Department of Neuroscience, Audiology Unit, University of Padova, Treviso, Italy.

Purpose: Otitis media with effusion (OME) is the most common ear disease in childhood. The hearing loss associated with OME impacts on children's language development and behavior. Eustachian tube insufflation are among possible treatments for OME, but data regarding their effectiveness are scarce. Read More

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Contraction of the stapedius and tensor tympani muscles explored by tympanometry and pressure measurement in the external auditory canal.

Hear Res 2022 07 27;420:108509. Epub 2022 Apr 27.

Centre national de la recherche scientifique (CNRS), Université d'Aix-Marseille, Centre St-Charles-Pôle 3C, Marseille, France. Electronic address:

It has been suggested that tensor tympani muscle (TTM) contraction may be involved in the development of ear-related pathologies such as tinnitus, hyperacusis and otalgia, called the tonic tensor tympani syndrome (TTTS). However, as there is no precise measure of TTM function under normal and pathological states, its involvement remains speculative. When the TTM or the stapedius muscle (SM) contracts, they both generate an increase of middle ear stiffness that can be measured through middle ear admittance. Read More

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Performance comparison of high-speed photoacoustic microscopy: opto-ultrasound combiner versus ring-shaped ultrasound transducer.

Biomed Eng Lett 2022 May 2;12(2):147-153. Epub 2022 Mar 2.

Departments of Electrical Engineering, Convergence IT Engineering, Mechanical Engineering, and Interdisciplinary Bioscience and Bioengineering, Medical Device Innovation Center, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673 Republic of Korea.

Photoacoustic microscopy (PAM) embedded with a 532 nm pulse laser is widely used to visualize the microvascular structures in both small animals and humans in vivo. An opto-ultrasound combiner (OUC) is often utilized in high-speed PAM to confocally align the optical and acoustic beams to improve the system's sensitivity. However, acoustic impedance mismatch in the OUC results in little improvement in the sensitivity. Read More

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[Characteristics and differential diagnosis of middle ear cholesteatoma and chronic suppurative otitis media with wideband acoustic immittance].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022 May;36(5):376-381

Department of Otolaryngology,Affiliated Hospital of Xuzhou Medical University.

Through analysis of the sound energy absorbance of wideband acoustic immittance to provide a basis for differential diagnosis of adult acquired secondary cholesteatoma of the middle ear and patients with chronic suppurative otitis media(CSOM). 38 cases of cholesteatoma and 40 cases of CSOM admitted to the Department of Otolaryngology, Affiliated Hospital of Xuzhou Medical University from September 2020 to December 2021 were selected as the research group, and 30 cases (60 ears) of normal adults were selected as the control group. A total of 16 frequency points were selected, and the energy absorbance of wideband acoustic immittance was taken as the research parameter. Read More

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Atrial fibrillation designation with micro-Raman spectroscopy and scanning acoustic microscope.

Sci Rep 2022 04 19;12(1):6461. Epub 2022 Apr 19.

Department of Natural Sciences, Acıbadem University, Istanbul, 34684, Turkey.

Atrial fibrillation (AF) is diagnosed with the electrocardiogram, which is the gold standard in clinics. However, sufficient arrhythmia monitoring takes a long time, and many of the tests are made in only a few seconds, which can lead arrhythmia to be missed. Here, we propose a combined method to detect the effects of AF on atrial tissue. Read More

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[Objective Audiological Test Procedures: Indications and Differential Diagnostics].

Laryngorhinootologie 2022 Apr 23;101(4):335-362. Epub 2022 Mar 23.

Universitätsklinik und Poliklinik für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals- Chirurgie, Universitätsklinikum Halle (Saale), Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Halle (Saale), Germany.

Diagnostics of hearing loss comprises subjective and objective methods and is successfully applied since many decades. This article introduces into the methods of impedance audiometry, otoacoustic emissions, auditory evoked potentials and electrically evoked potentials and describes the respective methodologies. Using an exemplary case, in this article we guide through all stages of objective audiological diagnostics and introduce the scientific and technical background, the application and evaluation of the findings of the objective test procedures. Read More

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[Eustachian tube dysfunction after cleft palate surgery : Use of the latest diagnostics].

HNO 2022 Jul 22;70(7):557-563. Epub 2022 Mar 22.

Klinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie "Otto Körner", Universitätsmedizin Rostock, Doberaner Str. 137-139, 18057, Rostock, Deutschland.

Objective: In patients with cleft palate, a high incidence of chronic obstructive Eustachian tube dysfunction (ETD) is assumed after surgery. Consequently, an increased rate of retracted eardrum or cholesteatoma is expected. Even though no common standard for investigating ETD is available, the development of objective tests has increased during the past 10 years. Read More

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Update on first African clinical trial on earpopper for the treatment of otitis media with effusion [FCT/UATH/HREC/PR/330].

Ann Afr Med 2022 Jan-Mar;21(1):65-70

Department of Otorhinolaryngology, University of Abuja Teaching Hospital and University of Abuja; Abuja Clinic, ENT Unit, Abuja, Nigeria.

Background: Otitis media with effusion (OME) is a middle ear condition characterized by the accumulation of serous fluid. It is common, though not exclusive; among children with its attendant developmental consequence if missed or untreated in early life. OME could be managed surgically, pharmacologically, or physiologically. Read More

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Dual Sensory Impairment: The Correlation between Age Related Macular Degeneration and Sensorineural Hearing Loss.

Medicina (Kaunas) 2022 Feb 14;58(2). Epub 2022 Feb 14.

Department of Physiology, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania.

The pathogeneses of age-related macular degeneration (AMD) and age-related hearing impairment are not yet fully understood. If AMD and age-related hearing impairment are correlated, the cause of both may be a result of a common vulnerability. The aim of this study was to assess the interrelation between age-related macular degeneration and age-related hearing loss. Read More

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February 2022

Mechanical ventilation and middle ear effusions among tracheostomy-dependent children.

Int J Pediatr Otorhinolaryngol 2022 Apr 15;155:111062. Epub 2022 Feb 15.

Department of Otolaryngology-Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Pediatric Otolaryngology, Children's Medical Center Dallas, Dallas, TX, USA. Electronic address:

Objective: To determine the cumulative 24-month incidence of middle ear effusion (MEE) among tracheostomy-dependent children requiring ventilatory support.

Methods: A prospective longitudinal cohort study included all children under 2 years of age with a tracheostomy placed at a tertiary care children's hospital between 2015 and 2020 that obtained at least one tympanometry exam. The development of MEE, defined as a flat tympanogram with normal external canal volume, and mechanical ventilation requirement at examination were recorded. Read More

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[Eigenvalue analysis of wideband acoustic immittance in secretory otitis media in children of different ages].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022 Mar;36(3):180-184

Department of Otolaryngology Head and Neck Surgery,Children's Hospital of Soochoow University,Suzhou,215000,China.

The characteristic values of broadband acoustic immittance of children of different ages during secretory otitis media were collected resonance frequency and absorption rate of middle ear in children of different ages were compared. Eighty-two children with secretory otitis media were selected for the broadband acoustic immittance test, including 62 cases (83 ears) in the young effusion group([3.5±0. Read More

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Nasal septum deviation and Eustachian tube function: A prospective case-control study based on tympanometry, tubomanometry, and ETDQ-7.

Acta Otorrinolaringol Esp (Engl Ed) 2022 Jan-Feb;73(1):35-41

Department of Otorhinolaryngology, Hospital de Braga, 4715 Braga, Portugal.

Introduction: The influence of isolated nasal septum deviation (NSD) in the Eustachian Tube (ET) function is still undetermined.

Objective: compare ET function between patients with severe NSD and patients with adequate nasal patency in terms of symptomology and objective exams and assess the impact of septoplasty in ET function in patients with severe NSD. METHODS AND METHODOLOGY: a prospective study was conducted. Read More

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February 2022

The Effect of Postmenopausal Osteoporosis on Middle Ear Resonance Frequency.

J Int Adv Otol 2021 Nov;17(6):526-529

Department of Otorhinolaryngology, Baskent University Hospital, Ankara, Turkey.

Background: The effect of postmenopausal osteoporosis on the middle ear mechano-acoustic system is unknown. The aim of this study is to investigate whether or not middle ear resonance frequency is affected in females with postmenopausal osteoporosis.

Methods: The study included postmenopausal women aged 45-60 years, separated into 2 groups as females with postmenopausal osteoporosis and healthy postmenopausal females (control group). Read More

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November 2021

Prevalence and causes of paediatric hearing loss in a rural province of Zimbabwe: A cross-sectional study.

Int J Pediatr Otorhinolaryngol 2022 Mar 14;154:111044. Epub 2022 Jan 14.

Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, University Hospital Copenhagen, Copenhagen, Denmark. Electronic address:

Background: Hearing loss (HL) in childhood is a significant disability with severe consequences for educational, cognitive, and social-emotional success. Nevertheless, prevalence estimates for HL in Sub-Saharan Africa (SSA) are based on scarce data. Therefore, we aimed to estimate the prevalence of HL in a sample of primary school children from a rural province of Zimbabwe. Read More

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Investigation of Acoustic Properties of Different Types of Low-Noise Road Surfacers under In Situ and Laboratory Conditions.

Materials (Basel) 2022 Jan 9;15(2). Epub 2022 Jan 9.

Voivodeship Roads Authority in Katowice, 40-609 Katowice, Poland.

Current literature on the performance characteristics of road surfaces is primarily focused on evenness, roughness and technical durability. However, other important surface properties require analysis, including noisiness, which is an important feature of the environmental impact of vehicular traffic around roads. This can be studied using various methods by which road noise phenomena are investigated. Read More

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January 2022

Inter-rater reliability of the diagnosis of otitis media based on otoscopic images and wideband tympanometry measurements.

Int J Pediatr Otorhinolaryngol 2022 Feb 7;153:111034. Epub 2022 Jan 7.

Interacoustics Research Unit, C/o Technical University of Denmark, Denmark.

Objectives: This study aims to investigate the inter-rater reliability and agreement of the diagnosis of otitis media with effusion, acute otitis media, and no effusion cases based on an otoscopy image and in some cases an additional wideband tympanometry measurement of the patient.

Methods: 1409 cases were examined and diagnosed by an otolaryngologist in the clinic, and otoscopy examination and wideband tympanometry (WBT) measurement were conducted. Afterwards, four otolaryngologists (Ear, Nose, and Throat doctors, ENTs), who did not perform the acute examination of the patients, evaluated the otoscopy images and WBT measurements results for diagnosis (acute otitis media, otitis media with effusion, or no effusion). Read More

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February 2022

Middle-ear effusion in children with cleft palate: congenital or acquired?

J Laryngol Otol 2022 Feb 10;136(2):137-140. Epub 2022 Jan 10.

Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Würzburg, Würzburg, Germany.

Objective: Cleft palates are one of the most common congenital malformations. Because of the loss of Eustachian tube function, middle-ear ventilation is reduced. The aim of this study was to determine if middle-ear effusions were present at birth or at the three-month audiological evaluation. Read More

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February 2022

Wideband Tympanometry Findings in School-aged Children: Effects of Age, Gender, Ear Laterality, and Ethnicity.

Ear Hear 2022 Jul-Aug 01;43(4):1245-1255. Epub 2021 Dec 24.

Hearing Research Unit for Children, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, QLD, Australia.

Objectives: Wideband tympanometry (WBT) measures middle-ear function across a range of frequencies (250 to 8000 Hz) while the ear-canal pressure is varied from +200 to -300 daPa. WBT is a suitable test to evaluate middle-ear function in children, but there is a lack of age-, ear-, gender-, or ethnicity-specific data throughout the literature. The purpose of this study was to investigate the effects of age, ear laterality, gender, and ethnicity on the WBT data retrieved from children aged 4 to 13 years determined to have normal middle-ear function. Read More

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[The main steps in treatment of the children with otitis media with effusion].

Vestn Otorinolaringol 2021 ;86(6):31-34

Pirogov Russian National Research Medical University, Moscow, Russia.

Material And Methods: 361 children at age from 11 months to 18 years with otitis media with effusion (OME) were inspected after tympanostomy during 2013-2018 years. Treatment was carried out in accordance with the stages of OME: secretory, mucous, fibrous. The main diagnostic methods were: otoscopy, tympanometry, endoscopy, computed tomography. Read More

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December 2021

Otoscopy and tympanometry outcomes from the National Health and Nutrition Examination Survey (NHANES).

Am J Otolaryngol 2022 Mar-Apr;43(2):103332. Epub 2021 Dec 14.

University of Mississippi Medical Center, Department of Otolaryngology Head and Neck Surgery, 2500 N. State St., Jackson, MS 39216, United States of America. Electronic address:

Purpose: The purpose of the study was to estimate the prevalence of conductive pathologies based on tympanometric and otoscopic findings in adults in the U.S. and examine relationships between abnormal findings and audiometrically defined or reported perceived hearing loss and tinnitus. Read More

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Intra-Cochlear Current Spread Correlates with Speech Perception in Experienced Adult Cochlear Implant Users.

J Clin Med 2021 Dec 13;10(24). Epub 2021 Dec 13.

Institut de l'Audition, Institut Pasteur, Université de Paris, INSERM, 75012 Paris, France.

Broader intra-cochlear current spread (ICCS) implies higher cochlear implant (CI) channel interactions. This study aimed to investigate the relationship between ICCS and speech intelligibility in experienced CI users. Using voltage matrices collected for impedance measurements, an individual exponential spread coefficient (ESC) was computed. Read More

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December 2021

[A preliminary study on characteristics of wideband acoustic immittance in patients with Meniere's disease].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021 Dec;35(12):1068-1072

College of Medical Technology,Xuzhou Medical University,Xuzhou,221004,China.

To explore the wideband absorbance characteristics of patients with Meniere's disease(MD). Wideband acoustic immittance was performed in 52 patients with unilateral Meniere's disease(UMD) and 30 control subjects with normal hearing. All UMD patients underwent pure tone audiometry, 226 Hz acoustic immittance, wideband acoustic immittance, and gadolinium contrast MRI. Read More

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December 2021

[Two-year experience in the balloon dilatation treatment of children with persistent auditory tube dysfunction].

Vestn Otorinolaringol 2021 ;86(5):54-57

Sverzhevsky Research Clinical Institute of Otorhinolaryngology, Moscow, Russia.

Objective: Is to study the effectiveness of the of balloon dilatation of the auditory tube in children with persistent dysfunction of the auditory tube. Examination and treatment of 28 children aged 5 to 16 years with persistent dysfunction of the auditory tube was performed. To diagnose and objectify the results of the treatment, taking of complaints and medical history of the patient, examination of ENT organs, endoscopic examination of the nose, nasopharynx and otoendoscopy, functional multispiral computed tomography of the auditory tubes, audiological examination (tympanometry, tonal threshold audiometry) were performed. Read More

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November 2021

[Objective parameters of auditory function in premature infants in the first year of life after taking ototoxic antibiotics].

Vestn Otorinolaringol 2021 ;86(5):12-16

Pirogov Russian National Research Medical University, Moscow, Russia.

Objective: To compare the condition of auditory function during the first year of life according to the registration of distortion product otoacoustic emission (DPOAE) and short-latency evoked potentials (SLEP) in premature infants who received ototoxic antibiotics to those ones, who did not.

Material And Methods: Auditory function was examined in 145 premature infants. Auditory assessment was carried out by registration of DPOAEs, SLEPs and tympanometry. Read More

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November 2021

Clinical Test Batteries to Diagnose Hearing Loss in Infants and Children: The Cross-Check Principle.

Otolaryngol Clin North Am 2021 Dec;54(6):1143-1154

Vanderbilt University Medical Center, 1215 21st Avenue South Suite 9302, Nashville, TN 37232, USA.

Frequency-specific audiometry and tympanometry are widely considered the foundation of the pediatric hearing evaluation. However, additional behavioral and objective measures are needed to cross-check findings and ensure an accurate and timely diagnosis. This is particularly important in the pediatric population, wherein a delay in diagnosis can have a significant impact on language development, learning, and educational outcomes. Read More

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December 2021

Anticipating real-ear insertion response using an external auditory canal model.

Auris Nasus Larynx 2022 Jun 28;49(3):389-395. Epub 2021 Oct 28.

Department of Otorhinolaryngology, Saiseikai Central Hospital, 1-4-17 Mita, Minato-ku, Tokyo, 108-0073, Japan.

Objectives: This study aimed to determine the acoustic characteristics of the external auditory canal (EAC) and predict the real-ear aided response (REAR) using an EAC model that includes the standing wave effect.

Methods: The EAC transfer function equations were derived by summing the incoming and outgoing waves. First, we investigated the real-ear unaided gain (REUG). Read More

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