Interaural attenuation for Sennheiser HDA 200 circumaural earphones

Brännström, K. Jonas; Lantz, Johannes

doi:10.3109/14992021003663111

Cited by 18 publications

(20 citation statements)

References 17 publications

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“…American National Standards Instute (ANSI, 2004), according to the occlusion effect when the external ear canal is closed or when clogged is increased, especially at low frequencies which are under the 2.0 kHz, the sound of loudness perception transmitted by bone conduction [7]. With the amount of occlusion effect in lower frequency has an inverse relationship between the value of IA [1,2]. Specifically, reducing the effect of occlusion headphones, causing an increase in the value of IA.…”

Section: Discussionmentioning

confidence: 99%

“…Overall, insert earphones produce greater attenuation between ears than supraaural earphones during pure-tone testing [1,13,14]. The purpose of this study, supraaural headphones may be insufficient when routinely uses clinics practices for masking applications.…”

mentioning

confidence: 95%

“…Differences between IA hearing of level of the tested ear (Hearing Level-HL) and hearing level of the unstestable (HL) is the algebraic between dB. The IA depends on the type of transducer used [1,2,3].…”

mentioning

confidence: 99%

“…Masking, ear which is better hearing is noised when testing the bad ones which has lower hearing thresholds (4,5,6). It is quite complex practise and it should be controlled simultaneously to several variables under stringent controls [1,7,8].…”

mentioning

confidence: 99%

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Examination of Insert Ear Interaural Attenuation (IA)Values in Audiological Evaluations

Gumus¹,

Gümüş²,

Ünsal³

et al. 2016

CIM

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Purpose: The purpose of this study was to evaluate Interaural Attenuation (IA) in frequency base in the insert earphones that are used in audiological assessments.Methods: Thirty healthy subjects between 18-65 years of age (14 female and 16 male) participated in our study. Otoscopic examination was performed on all participants. Audiological evaluations were performed using the Interacoustics AC40 clinical audiometer and ER-3A insert earphones. IA value was calculated by subtracting good ear bone conduction hearing thresholds of the worst airway hearing threshold.Results: In our measuring for 0.125-8.0 kHz frequency were performed in our audiometry device separately for each frequency. IA amount in the results we found in 1000 Hz and below frequencies about 75-110 dB range avarage is 89±5dB, in above 1000 Hz frequencies in 50-95 dB range and avarage it is changed to 69±5dB. Conclusion:According to the obtained findings the quantity of melting in the transition between the ears are increasing with the insert earphones. The insert earphone should be beside supraaural earphone that is routinely used in clinics. Difficult masking applications due to the increase in the value of IA can be easily done with insert earphones.SUPPLEMENT

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 95%

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confidence: 99%

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confidence: 99%

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Examination of Insert Ear Interaural Attenuation (IA)Values in Audiological Evaluations

Gumus¹,

Gümüş²,

Ünsal³

et al. 2016

CIM

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“…For example, if loud sound is introduced into a damaged ear through an earphone, the contralateral (undamaged) ear receives some sound input too. Its response to this, referred to as “crossover stimulation” or “cross-hearing”, is clinically significant because it may affect the results of a test designed to assess the hearing loss in the damaged ear (Brännström and Lantz 2010). The reduction in sound level between the ipsilateral ear, to which the sound is applied, and the contralateral ear is referred to as the interaural attenuation.…”

Section: Potential Routes For Internal Coupling Of Mammalian Earsmentioning

confidence: 99%

Internally coupled ears in living mammals

Mason

2016

Biol Cybern

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It is generally held that the right and left middle ears of mammals are acoustically isolated from each other, such that mammals must rely on neural computation to derive sound localisation cues. There are, however, some unusual species in which the middle ear cavities intercommunicate, in which case each ear might be able to act as a pressure-difference receiver. This could improve sound localisation at lower frequencies. The platypus Ornithorhynchus is apparently unique among mammals in that its tympanic cavities are widely open to the pharynx, a morphology resembling that of some non-mammalian tetrapods. The right and left middle ear cavities of certain talpid and golden moles are connected through air passages within the basicranium; one experimental study on Talpa has shown that the middle ears are indeed acoustically coupled by these means. Having a basisphenoid component to the middle ear cavity walls could be an important prerequisite for the development of this form of interaural communication. Little is known about the hearing abilities of platypus, talpid and golden moles, but their audition may well be limited to relatively low frequencies. If so, these mammals could, in principle, benefit from the sound localisation cues available to them through internally coupled ears. Whether or not they actually do remains to be established experimentally.

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Activation lateralization in human core, belt, and parabelt auditory fields with unilateral deafness compared to normal hearing

et al. 2012

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We studied activation magnitudes in core, belt, and parabelt auditory cortex in adults with normal hearing (NH) and unilateral hearing loss (UHL) using an interrupted, single-event design and monaural stimulation with random spectrographic sounds. NH patients had one ear blocked and received stimulation on the side matching the intact ear in UHL. The objective was to determine whether the side of deafness affected lateralization and magnitude of evoked blood oxygen level-dependent responses across different auditory cortical fields (ACFs). Regardless of ear of stimulation, NH showed larger contralateral responses in several ACFs. With right ear stimulation in UHL, ipsilateral responses were larger compared to NH in core and belt ACFs, indicating neuroplasticity in the right hemisphere. With left ear stimulation in UHL, only posterior core ACFs showed larger ipsilateral responses, suggesting that most ACFs in the left hemisphere had greater resilience against reduced crossed inputs from a deafferented right ear. Parabelt regions located posterolateral to core and belt auditory cortex showed reduced activation in UHL compared to NH irrespective of RE/LE stimulation and lateralization of inputs. Thus, the effect in UHL compared to NH differed by ACF and ear of deafness.

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Interaural attenuation for Sennheiser HDA 200 circumaural earphones

Cited by 18 publications

References 17 publications

Examination of Insert Ear Interaural Attenuation (IA)Values in Audiological Evaluations

Examination of Insert Ear Interaural Attenuation (IA)Values in Audiological Evaluations

Internally coupled ears in living mammals

Activation lateralization in human core, belt, and parabelt auditory fields with unilateral deafness compared to normal hearing

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