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Hearing performance benefits of a programmable power baha® sound processor with a directional microphone for patients with a mixed hearing loss.

Flynn MC, Hedin A, Halvarsson G, Good T, Sadeghi A - Clin Exp Otorhinolaryngol (2012)

Bottom Line: For any new technology, it is important to evaluate the degree of benefit under different listening situations.The test sound processor had significantly improved high frequency audibility (3,000-8,000 Hz).The test sound processor demonstrated significant improvements in the most challenging listening situation (speech recognition in noise).

View Article: PubMed Central - PubMed

Affiliation: Department of Research and Applications, Cochlear Bone Anchored Solutions, Gothenburg, Sweden.

ABSTRACT

Objectives: New signal processing technologies have recently become available for Baha® sound processors. These technologies have led to an increase in power and to the implementation of directional microphones. For any new technology, it is important to evaluate the degree of benefit under different listening situations.

Methods: Twenty wearers of the Baha osseointegrated hearing system participated in the investigation. The control sound processor was the Baha Intenso and the test sound processor was the Cochlear™ Baha® BP110power. Performance was evaluated in terms of free-field audibility with narrow band noise stimuli. Speech recognition of monosyllabic phonetically balanced (PB) words in quiet was performed at three intensity settings (50, 65, and 80 dB sound pressure level [SPL]) with materials presented at 0 degrees azimuth. Speech recognition of sentences in noise using the Hearing in Noise Test (HINT) in an adaptive framework was performed with speech from 0 degrees and noise held constant at 65 dB SPL from 180 degrees. Testing was performed in both the omni and directional microphone settings. Loudness growth was assessed in randomly presented 10 dB steps between 30 and 90 dB SPL to narrow band noise stimuli at 500 Hz and 3,000 Hz.

Results: The test sound processor had significantly improved high frequency audibility (3,000-8,000 Hz). Speech recognition of PB words in quiet at three different intensity levels (50, 65, and 80 dB SPL) indicated a significant difference in terms of level (P<0.0001) but not for sound processor type (P>0.05). Speech recognition of sentences in noise demonstrated a 2.5 dB signal-to-noise ratio (SNR) improvement in performance for the test sound processor. The directional microphone provided an additional 2.3 dB SNR improvement in speech recognition (P<0.0001). Loudness growth functions demonstrated similar performance, indicating that both sound processors had sufficient headroom and amplification for the required hearing loss.

Conclusion: The test sound processor demonstrated significant improvements in the most challenging listening situation (speech recognition in noise). The implementation of a directional microphone demonstrated a further potential improvement in hearing performance. Both the control and test sound processors demonstrated good performance in terms of audibility, word recognition in quiet and loudness growth.

No MeSH data available.


Related in: MedlinePlus

Mean bone conduction and air conduction thresholds for the study participants demonstrating the mixed hearing loss. The shaded area highlights one standard deviation of the mean.
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Figure 1: Mean bone conduction and air conduction thresholds for the study participants demonstrating the mixed hearing loss. The shaded area highlights one standard deviation of the mean.

Mentions: In total, 20 adults with skin penetrating titanium implants for standard attachment of a Baha sound processor participated in this study (Table 1). A total of 21 subjects were originally enrolled, but one was withdrawn for not meeting the inclusion criteria of measurable open-set sentence recognition in noise with the control sound processor (Intenso). All subjects had a mixed hearing loss, defined as bone conduction thresholds (PTA, 500, 1000, 2,000, and 3,000 Hz), between 15 and 55 dBHL with at least a 10 dB air/bone gap. The average bone conduction and air conduction thresholds for the participants can be observed in Fig. 1. Each subject was selected according to internationally accepted criteria (9). All participants were experienced Baha sound processor users with at least 12 months prior use. The study was conducted following Good Clinical Practice with approval from the Regional Ethical Review Board in Gothenburg (Approval, 063-10).


Hearing performance benefits of a programmable power baha® sound processor with a directional microphone for patients with a mixed hearing loss.

Flynn MC, Hedin A, Halvarsson G, Good T, Sadeghi A - Clin Exp Otorhinolaryngol (2012)

Mean bone conduction and air conduction thresholds for the study participants demonstrating the mixed hearing loss. The shaded area highlights one standard deviation of the mean.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3369989&req=5

Figure 1: Mean bone conduction and air conduction thresholds for the study participants demonstrating the mixed hearing loss. The shaded area highlights one standard deviation of the mean.
Mentions: In total, 20 adults with skin penetrating titanium implants for standard attachment of a Baha sound processor participated in this study (Table 1). A total of 21 subjects were originally enrolled, but one was withdrawn for not meeting the inclusion criteria of measurable open-set sentence recognition in noise with the control sound processor (Intenso). All subjects had a mixed hearing loss, defined as bone conduction thresholds (PTA, 500, 1000, 2,000, and 3,000 Hz), between 15 and 55 dBHL with at least a 10 dB air/bone gap. The average bone conduction and air conduction thresholds for the participants can be observed in Fig. 1. Each subject was selected according to internationally accepted criteria (9). All participants were experienced Baha sound processor users with at least 12 months prior use. The study was conducted following Good Clinical Practice with approval from the Regional Ethical Review Board in Gothenburg (Approval, 063-10).

Bottom Line: For any new technology, it is important to evaluate the degree of benefit under different listening situations.The test sound processor had significantly improved high frequency audibility (3,000-8,000 Hz).The test sound processor demonstrated significant improvements in the most challenging listening situation (speech recognition in noise).

View Article: PubMed Central - PubMed

Affiliation: Department of Research and Applications, Cochlear Bone Anchored Solutions, Gothenburg, Sweden.

ABSTRACT

Objectives: New signal processing technologies have recently become available for Baha® sound processors. These technologies have led to an increase in power and to the implementation of directional microphones. For any new technology, it is important to evaluate the degree of benefit under different listening situations.

Methods: Twenty wearers of the Baha osseointegrated hearing system participated in the investigation. The control sound processor was the Baha Intenso and the test sound processor was the Cochlear™ Baha® BP110power. Performance was evaluated in terms of free-field audibility with narrow band noise stimuli. Speech recognition of monosyllabic phonetically balanced (PB) words in quiet was performed at three intensity settings (50, 65, and 80 dB sound pressure level [SPL]) with materials presented at 0 degrees azimuth. Speech recognition of sentences in noise using the Hearing in Noise Test (HINT) in an adaptive framework was performed with speech from 0 degrees and noise held constant at 65 dB SPL from 180 degrees. Testing was performed in both the omni and directional microphone settings. Loudness growth was assessed in randomly presented 10 dB steps between 30 and 90 dB SPL to narrow band noise stimuli at 500 Hz and 3,000 Hz.

Results: The test sound processor had significantly improved high frequency audibility (3,000-8,000 Hz). Speech recognition of PB words in quiet at three different intensity levels (50, 65, and 80 dB SPL) indicated a significant difference in terms of level (P<0.0001) but not for sound processor type (P>0.05). Speech recognition of sentences in noise demonstrated a 2.5 dB signal-to-noise ratio (SNR) improvement in performance for the test sound processor. The directional microphone provided an additional 2.3 dB SNR improvement in speech recognition (P<0.0001). Loudness growth functions demonstrated similar performance, indicating that both sound processors had sufficient headroom and amplification for the required hearing loss.

Conclusion: The test sound processor demonstrated significant improvements in the most challenging listening situation (speech recognition in noise). The implementation of a directional microphone demonstrated a further potential improvement in hearing performance. Both the control and test sound processors demonstrated good performance in terms of audibility, word recognition in quiet and loudness growth.

No MeSH data available.


Related in: MedlinePlus