Ma C.,GN Resound |
Dittberner A.,GN Resound |
De Vries R.,GN Resound
141st Audio Engineering Society International Convention 2016, AES 2016 | Year: 2016
The binaural auditory steering strategy for hearing AIDS focuses to achieve a better hearing experience in terms of both "better ear" listening and situational awareness. We have taken into account the binaural auditory spatial processing strategy to optimize the acoustic beamforming filters. We investigate in this paper how human beings achieve better listening with cupped ears based on the head-related transfer function (HRTF) of the subjects with both open ears and cupped ears. We define the metrics better ear index and situational awareness index. We show that cupped ears can significantly improve the better ear index, and the open ears has better situational awareness. We can automatically choose one hearing aid with directivity similar to a cupped ear and another hearing aid similar to an open ear to achieve both better intelligibility and situational awareness in certain acoustic environments.
News Article | November 23, 2016
MarketStudyReport.com adds “Hearing Amplifiers Market Size By Product (On-the-Ear, In-the-Ear), Industry Analysis Report, Regional Outlook (U.S., Canada, UK, Germany, France, Spain, Italy, Netherlands, Norway, Sweden, Denmark, Switzerland, Russia, China, India, Australia, Japan, New Zealand, Brazil, South Africa), Application Potential, Price Trends, Competitive Market Share & Forecast, 2016-2023” new report to its research database. The report spread across 98 pages with table and figures in it. Global Hearing Amplifiers Market size was evaluated at $58.11 million for 2015 and is predicted to register CAGR of about 4.81% during forecast timeframe. Significant rise in aging population along with increasing occurrence of hearing problems have led to launch of aesthetically appealing equipments like hearing amplifiers and this has boosted industry growth during forecast timeframe. As per WHO(World Health Organization)reports, population with 65 years of age and above is projected to grow by 16.1% in 2050. As old age is considered as one of key risk factors giving rise to hearing problems ,the predicted increase in aging population is a major driver boosting industry growth. U.S. Hearing Amplifiers Market Size, by Product, 2012 ? 2023 (USD Million) U.S. Hearing Amplifiers Market Size, by Product, 2012 - 2023 (USD Million) Further, technological breakthroughs like launch of small sized hearing aids requiring less power and offering clear voice is predicted to promote hearing amplifiers market trends. In addition to this, growing demand for cosmetically appealing and hardly visible hearing aids suitable for modern lifestyle along with high purchasing capacity of population is predicted to propel industry demand. Product Trends The industry is segmented into various products like In-the-ear hearing aid amplifier and on-the-ear hearing aid amplifier. In-the-ear hearing amplifier segment is predicted to record CAGR of more than 5.21% during forecast timeline. Current technological innovations like creation of non- removable or permanent hearing aids that function on induction charge than battery charge to revive damaged components using stem cells are predicted to drive the segment growth. On-the-ear hearing aid amplifier segment led global hearing amplifiers market share for 2015 by contributing about 70.1% to total revenue during that year. Growth of the segment can be credited to factors like favorable regulations and growing device popularity among patients. Regional Trends Global industry is segmented into key geographical regions like North America, Europe, MEA, APAC and Latin America. Europe hearing amplifiers market size is biggest and was evaluated at $24.41 million for 2015. Germany and UK combined made significant contribution to total revenue of Europe. High occurrence of hearing problems and favorable regulations are the factors predicted to drive the regional industry growth. APAC industry is predicted to register maximum CAGR of 8.71% during forecast timeline. Large proportion of unexplored patient pool in the region, improved healthcare facilities and growing purchasing capacity of people is predicted to drive regional industry growth. Countries like India and China are key contributors to the industry growth of the region. Competitive Trends Key industry players profiled in the report include Soundhawk Corporation, Motorola Mobility, ShenzhenEnJoYou Electronics Company Limited, iHear Medical, IntriCon, Samsung Electronics, Starkey Hearing Technologies, Etymotic Research Incorporation, Earlens Corporation, Doppler Labs, Focus Ear LLC, Songbird Hearing Incorporation, Onsemi, Bragi, Nuheara, So Special Labs, EarGO and Sivantos Incorporation. The industry is oligopolistic in nature with only few key industry players dominating global hearing amplifiers market. For instance, limited number of industry participants like GN Resound, Sonova, Widex and William Demant together contributed about 80% of the total industry share for 2015. The industry witnesses less product differentiation and tough price based competition among the participants. To receive personalized assistance, write to us @ [email protected] with the report title in the subject line along with your questions or call us at +1 866-764-2150
PubMed | DenmarkLinkoping University, Cochlear Technology Center, Oticon Medical A S, Starkey Hearing Technologies and 2 more.
Type: Journal Article | Journal: American journal of audiology | Year: 2016
This article describes the perspectives of hearing device manufacturers regarding the exciting developments that the Internet makes possible. Specifically, it proposes to join forces toward interoperability and standardization of Internet and audiology.A summary of why such a collaborative effort is required is provided from historical and scientific perspectives. A roadmap toward interoperability and standardization is proposed.Information and communication technologies improve the flow of health care data and pave the way to better health care. However, hearing-related products, features, and services are notoriously heterogeneous and incompatible with other health care systems (no interoperability). Standardization is the process of developing and implementing technical standards (e.g., Noah hearing database). All parties involved in interoperability and standardization realize mutual gains by making mutually consistent decisions. De jure (officially endorsed) standards can be developed in collaboration with large national health care systems as well as spokespeople for hearing care professionals and hearing device users. The roadmap covers mutual collaboration; data privacy, security, and ownership; compliance with current regulations; scalability and modularity; and the scope of interoperability and standards.We propose to join forces to pave the way to the interoperable Internet and audiology products, features, and services that the world needs.
Ruaro A.,GN ReSound |
Thaysen J.,GN ReSound |
Jakobsen K.B.,Technical University of Denmark
IEEE Transactions on Antennas and Propagation | Year: 2016
A novel concept for an electrically small on-body antenna targeted for 2.4 GHz ISM band custom in-The-ear (ITE) hearing instrument (HI) applications is introduced. The antenna is based upon a cavity-backed design in order to take advantage of the maximum volume available ITE while providing isolation from the user's body, and it occupies only 40% of the volume of the sphere with radius a = 12mm. The antenna is implemented on a realistic three-dimensional (3-D)-printed lossy substrate and exhibits high efficiency of 70% and 22%, and a 6-dB impedance bandwidth of 108 and 149 MHz, when the antenna is measured in free space (FS) and ITE, respectively. A measurement campaign conducted in FS and on a specific anthropomorphic mannequin (SAM) head with ears shows that the radiation pattern is optimal for HI applications. Furthermore, the antenna is primarily polarized normal to the surface of the head to ensure the best on-body path gain (PG). This is substantiated by the study of the ear-to-ear (E2E) PG, which is measured and compared to analytic and numerical results. © 2016 IEEE.
Udesen J.,GN Resound |
Piechowiak T.,GN Resound |
Gran F.,GN Resound
Proceedings of the AES International Conference | Year: 2014
Sounds are said to be externalized when we hear them originate from outside the head. This paper investigates if visual stimuli alone can inuence the perceived externalization. An externalization test is performed on six normal hearing test subjects in three different environments where the visual stimuli is varied and the sound stimuli held constant using headphone based virtual sound. The virtual sound stimuli are based on the test subjects' own Head-Related-Transfer-Functions (HRTFs). Significant differences (p < 0:001) are observed on the externalization performance when the visual impressions of the test rooms is varied. It is concluded that auditory externalization not only rely on the acoustic stimuli but also on visual impression of the room in which the sound source is located in. Copyright © Audio Engineering Society 2014.
Gudmundson E.,Lund University |
Gudmundson E.,Swedish Defence Research Agency |
Jakobsson A.,Lund University |
Gran F.,GN Resound
IEEE International Ultrasonics Symposium, IUS | Year: 2012
Spectral Doppler ultrasound imaging typically consists of a spectrogram, showing the velocity distribution of the blood, and a brightness (B-) mode image allowing the operator to navigate. It is desirable to have both high spectral and velocity resolution, so that details in the blood flow can be traced, as well as a high B-mode frame rate to allow for tracking of movements and to adjust the position of the transducer. The blood flow signal is often sampled 1) using alternating transmissions for blood flow estimation and for B-mode imaging, or, 2) by acquiring a full Doppler spectrum and then parts of the B-mode image. The former has the disadvantage that it halves the sampling rate, making it likely that aliasing will occur when imaging fast moving blood or deeply positioned vessels; the latter that gaps appears in the spectrogram, and that if the frame rate of the B-mode images is slow, it will be difficult to track movements. Adaptive methods have been implemented to circumvent such problems, but even so, to get an acceptable frame rate of the B-mode images, the number of transmissions for Doppler estimation will be limited, restricting the spectral resolution. Alternatively, one may use an irregularly spaced emission pattern, but existing work on the topic is limited and generally suffers from poor resolution and spurious velocity components resulting from the irregular sampling pattern. In this paper, we examine the BIAA algorithm, showing that this approach allows for an accurate velocity estimate even from irregularly sampled measurements. Using an irregular emission pattern, with half the emissions used to form the B-mode image, the remaining emissions are found to yield accurate velocity estimates without reducing the maximally measurable velocity and without the spurious velocity components. Moreover, we show that the approach will allow for the same maximal velocity without aliasing as if all emissions would have been used for the velocity estimation. © 2012 IEEE.
Hansen K.L.,Rigshospitalet |
Hansen K.L.,Technical University of Denmark |
Gran F.,GN Resound |
Gran F.,Technical University of Denmark |
And 5 more authors.
Ultrasonics | Year: 2010
Spectrograms in medical ultrasound are usually estimated with Welch's method (WM). WM is dependent on an observation window (OW) of up to 256 emissions per estimate to achieve sufficient spectral resolution and contrast. Two adaptive filterbank methods have been suggested to reduce the OW: Blood spectral Power Capon (BPC) and the Blood Amplitude and Phase EStimation method (BAPES). Ten volunteers were scanned over the carotid artery. From each data set, 28 spectrograms were produced by combining four approaches (WM with a Hanning window (W.HAN), WM with a boxcar window (W.BOX), BPC and BAPES) and seven OWs (128, 64, 32, 16, 8, 4, 2). The full-width-at-half-maximum (FWHM) and the ratio between main and side-lobe levels were calculated at end-diastole for each spectrogram. Furthermore, all 280 spectrograms were randomized and presented to nine radiologists for visual evaluation: useful/not useful. BAPES and BPC compared to WM had better resolution (lower FWHM) for all OW < 128 while only BAPES compared to WM had improved contrast (higher ratio). According to the scores given by the radiologists, BAPES, BPC and W.HAN performed equally well (p > 0.05) at OW 128 and 64, while W.BOX scored less (p < 0.05). At OW 32, BAPES and BPC performed better than WM (p < 0.0001) and BAPES was significantly superior to BPC at OW 16 (p = 0.0002) and 8 (p < 0.0001). BPC at OW 32 performed as well as BPC at OW 128 (p = 0.29) and BAPES at OW 16 as BAPES at OW 128 (p = 0.55). WM at OW 16 and 8 failed as all four methods at OW 4 and 2. The intra-observer variability tested for three radiologist showed on average good agreement (90%, κ = 0.79) and inter-observer variability showed moderate agreement (78%, κ = 0.56). The results indicated that BPC and BAPES had better resolution and BAPES better contrast than WM, and that OW can be reduced to 32 using BPC and 16 using BAPES without reducing the usefulness of the spectrogram. This could potentially increase the temporal resolution of the spectrogram or the frame-rate of the interleaved B-mode images. © 2009 Elsevier B.V. All rights reserved.
Croghan N.B.H.,University of Colorado at Boulder |
Arehart K.H.,University of Colorado at Boulder |
Kates J.M.,GN ReSound
Journal of the Acoustical Society of America | Year: 2012
Dynamic-range compression (DRC) is used in the music industry to maximize loudness. The amount of compression applied to commercial recordings has increased over time due to a motivating perspective that louder music is always preferred. In contrast to this viewpoint, artists and consumers have argued that using large amounts of DRC negatively affects the quality of music. However, little research evidence has supported the claims of either position. The present study investigated how DRC affects the perceived loudness and sound quality of recorded music. Rock and classical music samples were peak-normalized and then processed using different amounts of DRC. Normal-hearing listeners rated the processed and unprocessed samples on overall loudness, dynamic range, pleasantness, and preference, using a scaled paired-comparison procedure in two conditions: un-equalized, in which the loudness of the music samples varied, and loudness-equalized, in which loudness differences were minimized. Results indicated that a small amount of compression was preferred in the un-equalized condition, but the highest levels of compression were generally detrimental to quality, whether loudness was equalized or varied. These findings are contrary to the louder is better mentality in the music industry and suggest that more conservative use of DRC may be preferred for commercial music. © 2012 Acoustical Society of America.
PubMed | GN ReSound
Type: Journal Article | Journal: International journal of audiology | Year: 2010
The purpose of this paper is to study the effects of dynamic-range compression and linear amplification on speech intelligibility and quality for hearing-impaired listeners. The paper focuses on the relative benefit of compression compared to linear amplification and the effect of varying the number of compression channels and the compression time constants. The stimuli are sentences in a background of stationary speech-shaped noise. Speech intelligibility and quality indices are used to predict the listener responses for a mild, moderate sloping, and moderate/severe hearing loss. The results show a strong interaction between signal processing, speech intensity, and hearing loss. The results are interpreted in terms of the two major effects of compression on speech: the increase in audibility and the decrease in temporal and spectral envelope contrast.
PubMed | GN Resound
Type: Journal Article | Journal: Trends in amplification | Year: 2010
For the characterization of hearing aids, a new test method has been defined in the new International Electrotechnical Commission (IEC) standard 60118-15. For this characterization, the hearing aid will be set to actual user settings as programmed by standard fitting software from the hearing aid manufacturer. To limit the variation of programming outcomes, 10 standard audiograms, which cover the entire range of audiograms met in clinical practice, have been defined. This article describes how the set of standard audiograms has been developed. This set of standard audiogram has been derived by a vector quantization analysis method on a database of 28,244 audiograms. Using this analysis method, sets of typical audiograms have been obtained of sizes 12 and 60. It turned out that the smaller set could not be used for selecting audiograms as sloping audiograms were absent. Therefore, the larger set has been analyzed to provide seven standard audiograms for flat and moderately sloping hearing loss and three standard audiograms for steep hearing loss.