Trial reportEar and hearing
Ear-canal reflectance, umbo velocity, and tympanometry in normal-hearing adults.
Trial report in Ear and hearing. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
42 citing papers in PubMed, 100 citations in OpenAlex.
- Power reflectance as a screening tool for the diagnosis of superior semicircular canal dehiscence.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2015Trial
- Comparison of ear-canal reflectance and umbo velocity in patients with conductive hearing loss: a preliminary study.Ear and hearingTrial
- The UmboMic: Characterization and Testing of a Middle Ear Microphone.Journal of the Association for Research in Otolaryngology : JARO · 2026Article
- [Supplementary use of broadband absorbance measurements for classification of normal hearing].HNO · 2026Article
- Restoration of High-Frequency Middle Ear Function in Partial Ossicular Discontinuity: A Basic Science and Clinical Correlation.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2026Article
- The Transmission of Sound to the Cochlea in Normal and Pathological Human Middle Ears.Journal of the Association for Research in Otolaryngology : JARO · 2025Review
- Effect of Middle Ear Prosthesis Diameter in Platinotomy and Partial Platinectomy on Hearing Gain: A Finite Element Study.Materials (Basel, Switzerland) · 2025Article
- The UmboMic: A PVDF Cantilever Microphone.Journal of micromechanics and microengineering : structures, devices, and systems · 2024Article
- Article
- Measuring absorbed energy in the human auditory system using finite element models: A comparison with experimental results.Technology and health care : official journal of the European Society for Engineering and Medicine · 2024Article
- Wideband Tympanometry (WBT) Features in Children with Cleft Palate and Otitis Media with Effusion Before and After Cleft Palate Surgery.Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India · 2023Article
- Design of Piezoelectric Dual-Bandwidth Accelerometers for Completely Implantable Auditory Prostheses.IEEE sensors journal · 2023Article
- Fundamental Concepts for Assessment and Interpretation of Wideband Acoustic Immittance Measurements.Seminars in hearing · 2023Article
- Evaluation of acoustic changes in and the healing outcomes of rat eardrums with pars tensa and pars flaccida perforations.Laryngoscope investigative otolaryngology · 2022Article
- Mechanics of Total Drum Replacement Tympanoplasty Studied With Wideband Acoustic Immittance.Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery · 2022Article
- The influence of otitis media with effusion on middle-ear impedance estimated from wideband acoustic immittance measurements.The Journal of the Acoustical Society of America · 2021Article
- Study on wideband tympanometry and absorbance within a Danish cohort of normal hearing adults.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2020Article
- Measurement of Wideband Absorbance as a Test for Otosclerosis.Journal of clinical medicine · 2020Article
- Effect of Middle-Ear Pathology on High-Frequency Ear Canal Reflectance Measurements in the Frequency and Time Domains.Journal of the Association for Research in Otolaryngology : JARO · 2019Article
- Can Wideband Tympanometry Be Used as a Screening Test for Superior Semicircular Canal Dehiscence?Clinical and experimental otorhinolaryngology · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 1 institution in 1 country.
Funding
Abstract
objectiveThis study compares measurements of ear-canal reflectance (ECR) to other objective measurements of middle ear function including audiometry, umbo velocity (VU), and tympanometry in a population of strictly defined normal-hearing ears.
designData were prospectively gathered from 58 ears of 29 normal-hearing subjects, 16 females and 13 males, aged 22 to 64 yr. Subjects met all of the following criteria to be considered as having normal hearing: (1) no history of significant middle ear disease; (2) no history of otologic surgery; (3) normal tympanic membrane on otoscopy; (4) pure-tone audiometric thresholds of 20 dB HL or better for 0.25 to 8 kHz; (5) air-bone gaps no greater than 15 dB at 0.25 kHz and 10 dB for 0.5 to 4 kHz; (6) normal, type-A peaked tympanograms; and (7) all subjects had two "normal" ears (as defined by these criteria). Measurements included pure-tone audiometry for 0.25 to 8 kHz, standard 226 Hz tympanometry, ECR for 0.2 to 6 kHz at 60 dB SPL using the Mimosa Acoustics HearID system, and umbo velocity (VU) for 0.3 to 6 kHz at 70 to 90 dB SPL using the HLV-1000 laser Doppler vibrometer (Polytec Inc).
resultsMean power reflectance (|ECR|) was near 1.0 at 0.2 to 0.3 kHz, decreased to a broad minimum of 0.3 to 0.4 between 1 and 4 kHz, and then sharply increased to almost 0.8 by 6 kHz. The mean pressure reflectance phase angle (∠ECR) plotted on a linear frequency scale showed a group delay of approximately 0.1 msec for 0.2 to 6 kHz. Small significant differences were observed in |ECR| at the lowest frequencies between right and left ears and between males and females at 4 kHz. |ECR| decreased with age but reached significance only at 1 kHz. Our ECR measurements were generally similar to previous published reports. Highly significant negative correlations were found between |ECR| and VU for frequencies below 1 kHz. Significant correlations were also found between the tympanometrically determined peak total compliance and |ECR| and VU at frequencies below 1 kHz. The results suggest that middle ear compliance contributes significantly to the measured power reflectance and umbo velocity at frequencies below 1 kHz but not at higher frequencies.
conclusionsThis study has established a database of objective measurements of middle ear function (ECR, umbo velocity, tympanometry) in a population of strictly defined normal-hearing ears. These data will promote our understanding of normal middle ear function and will serve as a control for comparison to similar measurements made in pathological ears.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.