scholarly journals Efficient hearing aid algorithm using DCT with uniformly re-sampled and recursively modified audiogram values

2021 ◽  
Vol 23 (1) ◽  
pp. 237
Author(s):  
K. Ayyappa Swamy ◽  
Zachariah C. Alex
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Filter Banks ◽  
Sampling Rate ◽  
Matrix Multiplication ◽  
Audio Signal ◽  
Long Duration ◽  
Efficient Performance ◽  
Gain Adjustment ◽  
Conductive Hearing

People with the hearing problems have different listening preferences and characteristics in hearing loss. So, hearing aids need algorithms that provide amplification based on frequency, so that the hearing-impaired persons can use hearing aids comfortably for a long duration. In this paper, a new algorithm is proposed for hearing aids in order to compensate for sensorineural and conductive hearing loss using discrete cosine transform (DCT). DCT coefficients of the input audio signal are multiplied with uniformly resampled and recursively modified audiogram values to compensate for hearing loss. This algorithm comprised of 4 stages namely precomputation to calculate gain values from audiogram, DCT, gain adjustment, and inverse DCT. In the above stated stages except precomputation, each stage requires only one matrix multiplication, which makes the proposed algorithm computational efficient. Performance of the proposed algorithm is compared with uniform filter banks, non-uniform filter banks, variable filter bank and reconfigurable filter banks. The algorithm is tested using audiograms with four different hearing loss cases. It is proved that the proposed algorithm provides less complexity, minimized delay and better matching with all types of audiograms, further, it also avoids degradation of audio signal due to sampling rate conversions in variable and reconfigurable filter banks.

An approach to bilateral bone-anchored hearing aid surgery in children: contralateral placement of sleeper fixture

2008 ◽  
Vol 123 (5) ◽  
pp. 555-557 ◽  
Author(s):  
J M Bernstein ◽  
P Z Sheehan
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Hearing Aid ◽  
Contralateral Side ◽  
Two Stage ◽  
Calvarial Bone ◽  
Optimal Position ◽  
Bone Anchored Hearing Aid ◽  
Conductive Hearing

AbstractObjective:Bone-anchored hearing aid surgery in younger children is a two-stage procedure, with a titanium fixture being allowed to osseointegrate for several months before an abutment is fitted through a skin graft. In the first procedure, it has been usual to place a reserve or sleeper fixture approximately 5 mm from the primary fixture as a backup in case the primary fixture fails to osseointegrate. This ipsilateral sleeper fixture is expensive, is often not used, and is placed in thinner calvarial bone where it is less likely to osseointegrate successfully. The authors have implanted the sleeper fixture on the contralateral side, with the additional objective of reducing the number of procedures for bilateral bone-anchored hearing aid implantation, providing a cost-effective use for the sleeper.Methods:The authors implanted the bone-anchored hearing aid sleeper fixture in the contralateral temporal bone instead of on the ipsilateral side in seven successive paediatric cases with bilateral conductive hearing loss requiring two-stage bone-anchored hearing aids, treated at the Royal Manchester Children's Hospital, UK.Results:The seven patients ranged in age from five to 15 years, with a mean age of 10 years; in addition, a 20-year-old with learning disability was also treated. In each case, the contralateral sleeper fixture was not needed as a backup fixture, but was used in four patients (57 per cent) as the basis for a second-side bone-anchored hearing aid.Conclusions:In children with bilateral conductive hearing loss, in whom a bilateral bone-anchored hearing aid is being considered and the second side is to be operated upon at a later date, we recommend placing the sleeper fixture on the contralateral side at the time of primary first-side surgery. Our technique provides a sleeper fixture located in an optimal position, where it also offers the option of use for a second-side bone-anchored hearing aid and reduces the number of procedures needed.

Use of hearing AIDS

1976 ◽  
Vol 14 (12) ◽  
pp. 45-46
Keyword(s):  
Hearing Loss ◽  
Middle Ear ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Auditory Training ◽  
Lip Reading ◽  
Conductive Hearing

Up to 3 million people in Britain might be helped by hearing aids.1 2 Most are over 65 years of age, but some are infants. All should be referred to specialist centres for assessment as soon as possible. Hearing aids generally help most in disorders of the middle ear (conductive hearing loss); they can also help those with sensorineural and other forms of hearing loss. The use of an aid often needs to be supplemented by lip reading and other means of auditory training.1 3

Successful Placement of a BAHA Implant in a Patient With Epidermolysis Bullosa: A Case Report and Review of the Literature

2017 ◽  
Vol 126 (11) ◽  
pp. 778-780 ◽  
Author(s):  
Jason R. Brown ◽  
D. Micah Milgraum ◽  
Farhaad R. Riyaz ◽  
Marla N. Jahnke ◽  
Prasad John Thottam
Keyword(s):  
Hearing Loss ◽  
Epidermolysis Bullosa ◽  
Hearing Aids ◽  
External Auditory Canal ◽  
Skin Irritation ◽  
Minor Trauma ◽  
Mixed Hearing Loss ◽  
Osseointegrated Implant ◽  
Bone Anchored Hearing Aid ◽  
Conductive Hearing

Introduction: Epidermolysis bullosa (EB) is a spectrum of mechanobullous disorders characterized by blistering following minor trauma or traction to the skin. Hearing loss in this population is poorly described in the otolaryngology literature, and its treatment oftentimes results in external auditory canal skin irritation. Case Presentation: We present the case of a 26-year-old female with EB and mixed hearing loss unable to wear conventional hearing aids due to sequelae of the external auditory canals. An osseointegrated implant was used as other hearing aids were deemed to be too destructive of the external auditory canal skin. Management and Outcome: Our patient underwent placement of a right bone-anchored hearing aid with minimal disruption of the surrounding skin using a minimally invasive punch technique. Over 1 year of follow-up, her course was complicated by 1 simple cellulitic infection at the surgical site treated successfully with oral antibiotics. Discussion: The literature regarding the otolaryngologic manifestations of EB is sparse. The otologic sequelae are particularly overlooked in the workup and management. Based on the results of this case study, it appears that an osseointegrated implant can be safely utilized to treat significant mixed or conductive hearing loss in patients with EB.

scholarly journals Stapedotomy post-operative results and complications

2020 ◽  
Vol 6 (8) ◽  
pp. 1442
Author(s):  
Hanumant S. Giri ◽  
Ram C. Bishnoi ◽  
Pooja D. Nayak ◽  
Ninad S. Gaikwad
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Major Complication ◽  
Safe Procedure ◽  
Hearing Results ◽  
Post Surgery ◽  
Localized Disease ◽  
Conductive Hearing

<p class="abstract"><strong>Background:</strong> Otosclerosis is a hereditary localized disease of the bone derived from the otic capsule. It is characterized by alternating phases of bone formation and resorption and patient presents with conductive hearing loss. Treatment of otosclerosis can be of two kinds: hearing aids and surgery. Stapedectomy and stapedotomy are the two surgical procedures done for treatment of otosclerosis. Present study was conducted on 30 patients with otosclerosis who underwent stapedotomy to assess the hearing results post-surgery by serial Audiometric studies and to study the complications of stapedotomy surgery.</p><p class="abstract"><strong>Methods:</strong> This prospective observational study conducted on 30 patients of otosclerosis who fulfilled the inclusion and exclusion criteria.  </p><p class="abstract"><strong>Results:</strong> In this study of thirty cases of otosclerosis which were operated for small fenestra stapedotomy, we conclude that Hearing gain post-surgery was remarkable especially for patients with a pure conductive hearing loss. There was no deterioration in hearing after two years of follow-up. In our study on 30 patients we encountered minor complication in 4 patients (13.33%) and 1 major complication of profound sensorineural hearing loss 3.33%.</p><p class="abstract"><strong>Conclusions:</strong> We conclude that stapedotomy is a relatively safe procedure with significant post-surgery hearing benefit.</p>

The first reported treatment of Nager syndrome associated hearing loss with bone-anchored hearing aids: case report

2011 ◽  
Vol 126 (1) ◽  
pp. 76-78 ◽  
Author(s):  
G P Davies ◽  
I J M Johnson
Keyword(s):  
Hearing Loss ◽  
Case Report ◽  
Literature Review ◽  
Current Literature ◽  
Hearing Aids ◽  
Clinical Case ◽  
Conductive Hearing Loss ◽  
First Case ◽  
Nager Syndrome ◽  
Conductive Hearing

AbstractObjective:To report the first case of treatment of Nager syndrome associated conductive hearing loss with bone-anchored hearing aids, in a three-year-old boy.Method:Clinical case report and current literature review regarding the use of bone-anchored hearing aids in the treatment of conductive hearing loss in children.Results:A three year eight month old boy with Nager syndrome was successfully treated for conductive hearing loss using bilateral bone-anchored hearing aids.Conclusion:This is the first case report of the use of bone-anchored hearing aids to treat Nager syndrome associated conductive hearing loss. Treatment was safe and successful in this case.

Hearing in Noise With Unilateral Versus Bilateral Bone Conduction Hearing Aids in Adults With Pseudo-conductive Hearing Loss

2020 ◽  
Vol 41 (3) ◽  
pp. 379-385
Author(s):  
Ohad Hilly ◽  
Meirav Sokolov ◽  
Reut Beck Finkel ◽  
Ofir Zavdy ◽  
Rafael Shemesh ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Bone Conduction ◽  
Hearing In Noise ◽  
Bone Conduction Hearing ◽  
Conductive Hearing

scholarly journals ADHEAR in Conductive Hearing Loss: a case study

2020 ◽  
Vol 30 (Supplement_2) ◽  
Author(s):  
T Marques ◽  
A Carvalho ◽  
A Miguéis
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Bone Conduction ◽  
Single Subject ◽  
Non Invasive ◽  
Middle Ear Cholesteatoma ◽  
Bone Conduction Hearing ◽  
Conductive Hearing ◽  
Hearing System

Abstract Introduction Bone conduction hearing systems can be applied through non-invasive devices, using soft bands that exert pressure on the skin, or they can be surgically implanted (Bone Anchored Hearing Aid - BAHA). However, these bone conduction devices are frequently not well accepted due to the pressure on the head. Therefore, a new non-surgical hearing system was developed not to exert pressure on the skin, the ADHEAR. The bone anchorage in ADHEAR is performed through an adhesive adapter and is indicated for patients with conductive hearing loss and normal inner ear function. Objectives Evaluate the audiological performance with the adhesive bone conduction hearing device (ADHEAR) in a patient with conductive hearing loss. Methodology The study was designed as a prospective single-subject repeated-measure study with the subject serving as his own control. A 29 year old female patient who had a primary surgery due to middle ear cholesteatoma, was adapted with unilateral non-invasive adhesive bone conduction system for the treatment of conductive hearing loss. Air and bone conduction thresholds, word recognition scores (WRS) and speech recognition thresholds (SRT) in quiet and noise were assessed to verify the inclusion criteria of the study. Aided and unaided pure tone audiometry at 0.5, 1, 2 and 4 kHz in free field and speech audiometry in quiet and noise were performed at baseline and after 4 weeks with the ADHEAR. Results The functional gain with the ADHEAR averaged over 0.5, 1, 2, and 4 kHz after 4 weeks of usage of the adhesive hearing system, improved from 55 dB HL to 31dB HL. Speech perception in quiet and noise improved significantly in the aided situation, with SRT in quiet improving from 60 to 35 dB HL, when compared to the unaided condition. Similar results were found in noise. The patient evaluated the ADHEAR system as being useful, and without complaints of skin pressure. There was no adverse skin reaction. Conclusion Hearing performance was significantly better with ADHEAR under all test conditions. Therefore, this transcutaneous hearing system seems to be an excellent alternative for patients who need a hearing solution for conductive hearing loss but for clinical reasons cannot undergo surgery or conventional hearing aids. Furthermore, it preserves skin over the mastoid and reduces the risk of infection. Otherwise it has benefits verified by absence of head pressure and improvement of patient’s quality of life.

scholarly journals Isolated Congenital Round Window Atresia: Report of 2 Cases

2019 ◽  
Vol 99 (7) ◽  
pp. 433-436
Author(s):  
Wai Keat Wong ◽  
Lesley Salkeld ◽  
David Flint
Keyword(s):  
Computed Tomography ◽  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Round Window ◽  
High Resolution Computed Tomography ◽  
Computed Tomography Scanning ◽  
Uncommon Condition ◽  
Conductive Hearing ◽  
Tomography Scanning

Round window atresia (RWA) is an uncommon condition and can result in a conductive hearing loss. Two cases of nonsyndromal bilateral RWA in 2 members of the same family are reported. Both cases presented with a conductive hearing loss of 20 to 30 dB. High-resolution computed tomography scanning was used to diagnose the condition. The patients were rehabilitated with hearing aids. Review of the literature has shown disappointing results in hearing improvement with cochlear fenestration in an attempt to address this condition. Patients presenting with unexplained conductive hearing loss should be offered computed tomography scanning. The cases we report add to the literature to benefit future patients in preoperative counseling and better inform management.

Comparison of Traditional Bone-Conduction Hearing Aids with the Baha® System

2010 ◽  
Vol 21 (04) ◽  
pp. 267-273 ◽  
Author(s):  
Lisa Christensen ◽  
Laura Smith-Olinde ◽  
Jillian Kimberlain ◽  
Gresham T. Richter ◽  
John L. Dornhoffer
Keyword(s):  
Hearing Loss ◽  
Hearing Aids ◽  
Conductive Hearing Loss ◽  
Bone Conduction ◽  
System Versus ◽  
Data Collection And Analysis ◽  
First Choice ◽  
Bone Conduction Hearing ◽  
Functional Gain ◽  
Conductive Hearing

Background: Little research exists to demonstrate efficacy and verification measures of the Baha® system versus traditional bone-conduction hearing aids. This study gives statistical data about 10 children who have used traditional bone-conduction hearing aids, Baha coupled to a Softband, and the Baha system implanted. Purpose: The purpose of this study was to compare functional gain at 500, 1000, 2000, and 4000 Hz for infants and children with bilateral conductive hearing loss who were initially fit with traditional bone-conduction devices then progressed to Baha with Softband and finally to unilateral Baha implants. Research Design: Retrospective five-year chart review. Study Sample: 10 children with bilateral conductive hearing loss due to congenital atresia and/or microtia. Participants ranged in age from 6 mo to 16 yr; three were male and seven were female. Two participants were African-American, five Caucasian, and three Hispanic. Intervention: The intervention was the Baha system used in children via a Softband or implanted as compared to traditional bone-conduction hearing aids. Data Collection and Analysis: Single-factor, repeated analyses of variance were run to examine the amount of functional gain delivered by the various devices as well as the threshold measures with each device at each frequency. Results: Participants in this study showed a statistically significant improvement when using the Baha Softband over traditional bone-conduction hearing aids. An implanted Baha has statistically as much gain as a bone-conduction transducer at all frequencies tested. Conclusions: The Baha system is a valid treatment in conductive hearing loss via a Softband or implanted. It statistically outperforms the traditional bone-conduction hearing aids and should be used as a first choice in intervention rather than a last option for inoperable conductive hearing loss.

Digital Hearing Aids Using Automated Varying Bandwidth Finite Impulse Response Filter Banks

2020 ◽  
Vol 10 (9) ◽  
pp. 2005-2009
Author(s):  
Hu Jun ◽  
Zeng Jian ◽  
Yi Hong ◽  
R. Jayabharathy ◽  
V. Gomathi ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Auditory System ◽  
Hearing Aids ◽  
Filter Bank ◽  
Filter Banks ◽  
Finite Impulse Response ◽  
Research Work ◽  
Assistive Technologies ◽  
Digital Hearing Aids ◽  
Variable Bandwidth

A human auditory system is a highly complex sensitive system which transfers the acoustic sound into neuroelectrical signals toward the brain. Hearing difficulties or deafness are the outcomes of the problems occurred at any part of the auditory system. Assistive technologies such as hearing aids are developed to improve the quality of life of the hearing impaired people. Current digital hearing aids have fixed bandwidth filter banks which cannot provide enough flexibility to match with audiogram of different hearing loss. Recently, variable bandwidth filter banks have been introduced with different technologies to match more closely with the audiogram of a particular hearing loss. This research work proposes and implements a software controlled variable bandwidth FIR filter bank using Matlab GUI. In the Matlab GUI, in the filter bank, the bandwidth of every filter is adjusted dynamically in the Matlab GUI such that it fits more closely to the audiogram of a particular hearing loss. An experiment has been conducted in the developed Matlab GUI with various hearing loss, and the results show that the proposed system matches the filter bank magnitude response very closely to the audiogram of a particular hearing loss and reduces the matching error.

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