• International Journal of Internet, Broadcasting and Communication
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• 제9권2호
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• pp.58-63
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• 2017

The sound we hear is transmitted through the atmosphere. However, both the sound we want to hear and the surrounding sound are mixed, and noise is generated, and the sound is not clearly transmitted due to factors such as distance. In particular, in closed spaces like buildings, it is often difficult to hear sounds from outside because of the sound of reflection. People with hearing impairments, such as the elderly and the deaf, have a hard time hearing the sounds they want to hear. Thus, we are developing a hearing aid that can detect radio waves. To this end, we propose the development of a hearing aid that uses FM radio and Bluetooth. These devices are expected to be useful not only for the elderly and the deaf but also in situations where information is transmitted to a large number of people, such as students and tourists, in a large space. The main purpose of this device is to enable users to hear sound correctly without blind spots.

• 전자공학회논문지SC
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• 제49권3호
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• pp.69-74
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• 2012

본 논문에서는 국방기술을 활용하여 전투병사의 귀를 폭음으로부터 보호하면서도 상호 교신의 어려움을 최소화하는 야전형 디지털 보청기에 관해 연구한 결과를 보여준다. 보청기는 작은 소리를 증폭하기도 하지만 급격하게 커지는 폭음은 오히려 감쇠시킬 수 있는 신호의 압축이 보편화되어 있다. 이를 전투 병사의 귀에 활용하면 그들의 귀를 보호하게 된다. 디지털 보청기의 개발 과정은 핵심 부품인 DSP IC 칩이 개선되어 새로이 출시되면, 그에 대응해서 새로운 칩에 맞는 펌웨어와 휘팅 소프트웨어를 개발하면 된다. 최근에 캐나다 DSP Factory에서 설계 출시된 Ezairo 5910칩을 가지고 현재 연구되는 보청기 펌웨어 개발의 일부를 소개하고자 한다.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 추계학술대회
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• pp.111-113
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• 1996

The impaired person and the elderly who has hearing loss have been continuously increased and these people's desire for participating society as a producer has been increased also. So they strongly request the aid device which can compensate their handicap. The healing aid telephone is one of the basic aid devices that helps the hearing impaired to communicate with other people and to acquire useful information. We design the new model of the hearing aid telephone and test it's efficiency in three fields - electrical, speech perception, user test. From the result of the test we certify that the new model is better for the hearing impaired to understand the meaning of telephone speech than the old general models. We expect that the advanced healing aid telephone can be developed by the research about speech perception characteristics of the hearing impaired in engineering and clinical side.

• 한국소음진동공학회논문집
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• 제16권1호
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• pp.81-88
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• 2006

The most recent trend on digital hearing aid is to increase the ratio of signal to noise by directivity or to develop noise reduction algorithm inside DSP IC chip. This paper designed, fabricated and tested a digital hearing aid directivity testing device in which a micro-mouse-like the stepping motor with a speaker rotates around an examinant. Both ears of the examinant were fixed with ITE hearing aids in order to respond to receiving sound. The experimental results were compared with those of a boundary element method program for verification. The diameter of the directivity testing device was 2 m and the micro-mouse was precisely controlled by PICBASIC micro processor.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.469-474
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• 2005

The most recent trend on digital hearing aid is to increase the ratio of signal to noise by directivity or to develop noise reduction algorithm inside DSP IC chip. This paper designed, fabricated and tested a digital hearing aid directivity testing device in which a micro-mouse-1ike the stepping motor with a speaker rotates around an examinant. Both ears of the examinant were fixed with ITE hearing aids in order to response to receiving sound. The experimental results were compared with a boundary element method program for verification. The diameter of the directivity testing device was 2 [m] and the micro-mouse was precisely controlled by PICBASIC micro processor.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
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• pp.367-370
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• 2008

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
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• pp.360-363
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• 2008

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1820-1825
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• 2005

DSP chip parameters of a digital hearing aid (HA) should be optimally selected or fitted for hearing impaired persons. The more precise parameter fitting guarantees the better compensation of the hearing loss (HL). Digital HAs adopt DSP chips for more precise fitting of various HL threshold curve patterns. A specific DSP chip such as Gennum GB3211 was designed and manufactured in order to match up to about 4.7 billion different possible HL cases with combination of 7 limited parameters. This paper deals with a digital HA fitting program which is developed for optimal fitting of GB3211 DSP chip parameters. The fitting program has completed features from audiogram input to DSP chip interface. The compensation effects of the microphone and the receiver are also included. The paper shows some application examples.

• 제어로봇시스템학회논문지
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• 제12권6호
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• pp.530-538
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• 2006

DSP chip parameters of a digital hearing aid (HA) should be optimally selected or fitted for hearing impaired persons. The more precise parameter fitting guarantees the better compensation of the hearing loss (HL). Digital HAs adopt DSP chips for more precise fitting of various HL threshold curve patterns. A specific DSP chip such as Gennum GB3211 was designed and manufactured in order to match up to about 4.7 billion different possible HL cases with combination of 7 limited parameters. This paper deals with a digital HA fitting program which is developed for optimal fitting of GB3211 DSP chip parameters. The fitting program has completed features from audiogram input to DSP chip interface. The compensation effects of the microphone and the receiver are also included. The paper shows some application examples.

• 전자공학회논문지SC
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• 제40권6호
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• pp.16-23
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• 2003

본 논문에서 보청기를 위한 개별 BJT 소자의 효과적인 바이어스 회로를 제안한다. 보청기에 널리 사용되는 컬렉터 귀환 바이어스 회로는 부귀환 저항을 가지고 있다. 이 저항은 AC와 DC에 동시에 영향을 줌으로서 DC 바이어스 점의 변화 없이 증폭기의 이득을 변화시키기 어렵다. 또한 기존회로는 보청기의 이득이 높을 경우 전원 잡음의 정귀환으로 발진할 수 있는 단점이 있다. 제안된 회로는 컬렉터 귀환 바이어스회로에 베이스와 전원 사이에 컬렉터 저항보다 β배 더 큰 저항을 추가하여 기존회로의 두 가지 단점을 줄일 수 있다. 제안된 회로에서 DC 바이어스 점의 변화 없이 증폭기의 이득을 변경 할 수 있고 모의실험에서 기존회로보다 전원 잡음 이득을 18.5%정도 감소시킬 수 있다.