The effect of bone conduction microphone locations on speech intelligibility and sound quality

McBride, Maranda; Tran, Phuong K.; Łȩtowski, Tomasz; Patrick, Rafael

doi:10.1016/j.apergo.2010.09.004

Cited by 48 publications

(42 citation statements)

References 20 publications

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“…Bone conduction involves sound transmission through the bone and soft tissue of the head, so the placement of bone conduction devices is likely to have strong influence on signal transmission (Snidecor et al, 1959;Acker-Mills et al, 2005;Stenfelt and Goode, 2005;Gripper et al, 2007;McBride et al, 2008a;McBride et al, 2008b;Osafo-Yeboah et al, 2009;Stanley and Walker, 2009;McBride et al, 2011). Two skull locations were investigated in this study: the mastoid process, which is a common transducer location for hearing aids and clinical applications and is also useful for communications (McBride et al, 2008a;McBride et al, 2008b;Osafo-Yeboah et al, 2009;McBride et al, 2011), and the mandibular condyle, which is a commonly used and effective location for bone conduction communication (McBride et al, 2008a;McBride et al, 2008b;OsafoYeboah et al, 2009;Stanley and Walker, 2009;McBride et al, 2011).…”

Section: Skull Locationsmentioning

confidence: 98%

“…Two bone conduction transducers were used in this study: the RadioEar B-71, which is the standard bone transducer for audiometric work, and the Oiido SD02, which has been used in a variety of communication studies (Tran et al, 2008;McBride et al, 2010;Tran and Letowski, 2010;McBride et al, 2011). During the experiment, each participant wore one transducer at a time.…”

Section: Bone Conduction Transducersmentioning

confidence: 99%

“…Bone conduction transducers can also be used without obstructing a listener's ears and without interfering with hearing protection devices. These benefits make bone conduction an attractive means for radio communication, and several laboratories have conducted investigations using a variety of bone conduction transducer devices placed at various skull locations (e.g., McBride et al, 2008a;McBride et al, 2008b;Osafo-Yeboah et al, 2009;Stanley and Walker, 2009;Tran and Letowski, 2010;McBride et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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A free-field method to calibrate bone conduction transducers

Pollard

Tran

Łȩtowski

2013

The Journal of the Acoustical Society of America

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Bone conduction communication systems employ a variety of transducers with different physical and electroacoustic properties, and these transducers may be worn at various skull locations. Testing these systems thus requires a reliable means of transducer calibration that can be implemented across different devices, skull locations, and settings. Unfortunately, existing calibration standards do not meet these criteria. Audiometric bone conduction standards focus on only one device model and on limited skull locations. Furthermore, while mechanical couplers may be used for calibration, the general human validity of their results is suspect. To address the need for more flexible, human-centered calibration methods, the authors investigated a procedure for bone transducer calibration, analogous to free-field methods for calibrating air conduction headphones. Participants listened to1s third-octave noise bands (125-12,500 Hz) alternating between a bone transducer and a loudspeaker and adjusted the bone transducer to match the perceived loudness of the loudspeaker at each test frequency. Participants tested two transducer models and two skull locations. Intra- and inter-subject reliability was high, and the resulting data differed by transducer, by location, and from the mechanical coupler. The described procedure is flexible to transducer model and skull location, requires only basic equipment, and directly yields perceptual data.

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Section: Skull Locationsmentioning

confidence: 98%

Section: Bone Conduction Transducersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A free-field method to calibrate bone conduction transducers

Pollard

Tran

Łȩtowski

2013

The Journal of the Acoustical Society of America

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“…Researchers sought to identify the characteristics of BC speech [7], [11]. When the sound vibrations propagate through the skull bone, these need to overcome the bone's opposition to transfer energy caused by its impedance.…”

Section: Characteristics Of Bone Conducted Speechmentioning

confidence: 99%

Pitch Determination from Bone Conducted Speech

Rahman

Shimamura

2016

IEICE Trans. Inf. & Syst.

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SUMMARYThis paper explores the potential of pitch determination from bone conducted (BC) speech. Pitch determination from normal air conducted (AC) speech signal can not attain the expected level of accuracy for every voice and background conditions. In contrast, since BC speech is caused by the vibrations that have traveled through the vocal tract wall, it is robust against ambient conditions. Though an appropriate model of BC speech is not known, it has regular harmonic structure in the lower spectral region. Due to this lowpass nature, pitch determination from BC speech is not usually affected by the dominant first formant. Experiments conducted on simultaneously recorded AC and BC speech show that BC speech is more reliable for pitch estimation than AC speech. With little human work, pitch contour estimated from BC speech can also be used as pitch reference that can serve as an alternate to the pitch contour extracted from laryngograph output which is sometimes inconsistent with simultaneously recorded AC speech. key words: bone conducted speech, air conducted speech, pitch frequency, laryngograph output, pitch reference

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“…It can be used as supplement with the AC speech to enhance the accuracy of the SR system by enhancing the speech. Placement of the BCM influences intelligibility of the speech, literature studies show the various location to place the BCM [8][9][10]. Locations near the larynx result in higher intensity, while locations near the temple result in higher intelligibility [9].…”

Section: Speech Enhancementmentioning

confidence: 99%

A Review on Multimodal Speaker Recognition

2017

Asian J Pharm Clin Res

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A review on multimodal speaker recognition (SR) is being presented. For many decades, the SR has been studied, and still, it has grabbed the interest of many researchers. SR includes two levels -system training and system testing. The robustness of the SR system depends on the training environment and testing environment as well as the quality of speech. Air conducted (AC) speech is a source, from which speaker is recognized by extracting the features. The performance of the SR system depends on AC speech. Further to improve the robustness and accuracy of the SR system various other sources (modals) like throat microphone, bone conduction microphone, array of microphones, non-audible murmur, non-auditory information like video are used in complementary with standard AC microphone. This paper is purely a review on SR and various complimentary modals.

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The effect of bone conduction microphone locations on speech intelligibility and sound quality

Cited by 48 publications

References 20 publications

A free-field method to calibrate bone conduction transducers

A free-field method to calibrate bone conduction transducers

Pitch Determination from Bone Conducted Speech

A Review on Multimodal Speaker Recognition

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