Comparison: real and simulated ear insertion gain

Campos, Patrícia Danieli; Mondelli, Maria Fernanda Capoani Garcia; Ferrari, Débora Viviane

doi:10.1590/s1808-86942011000500003

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…In the analysis by frequency bands ( Table 2), it can be noted that the frequencies of 500, 1000, 2000, and 4000 Hz showed higher values at the LM, which may indicate that the predominant noise in the working environment is within these frequency bands. Regarding the intensities verified by the PM at each of the frequencies (Table 2), we should mention that the depth of the probe insertion can interfere with the results due to the presence of the standing waves, particularly for higher frequencies (19) , which could change the level of sound pressure measured in real-ear measurements (21) .…”

Section: Discussionmentioning

confidence: 99%

“…At one end, the microphone is connected to the silicone probe, which is 58 mm long. Nevertheless, only 28 mm was inserted into the EAM of the participants, value adopted by the geometric method (19) , thereby ensuring that the probe would not be obstructed by the HP, which was 25 mm long. To assist with inserting the probe on the EAM, an otoscope and a pre-molding flashlight were used.…”

Section: Methodsmentioning

confidence: 99%

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Avaliação do protetor auditivo em situação real de trabalho pelo método field Microphone-in-real-ear

Rocha

Longo

Moreira

et al. 2016

CoDAS

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Purpose To evaluate the effectiveness of the attenuation of a hearing protector (HP) in a real work situation using the field-microphone-in-real-ear method (f-MIRE). Methods Eighteen individuals of both genders (mean age of 47.17±8 years) participated in this study. In the workplace, the personal attenuation level of the HP was assessed using the f-MIRE method, followed by orientation about the importance of using the HP, cleaning and storing the device, and training for effective placement. Results The analyses showed a significant statistic attenuation for all of the collected data (total noise, by frequency band and dose) when the noise levels in the lapel microphone and the probe microphone were compared. In the comparison of the attenuation values provided by the manufacturer and those found in this study, we observed higher values for the manufacturer in all frequency bands. No difference was observed for the noise levels in the different activities and times evaluated. Conclusion The findings of this study enabled us to know the personal level of attenuation of the HP during a real work situation, which was within the limits of tolerance. It was also possible to collect information about the environmental noise to which these workers are exposed. We noticed situations where this level exceeded the safety values, and therefore it is recommended the use of the HP. It is important that more studies are conducted using the f-MIRE method, because it may be an ally to assess the effectiveness of the HP attenuation in the workplace.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Avaliação do protetor auditivo em situação real de trabalho pelo método field Microphone-in-real-ear

Rocha

Longo

Moreira

et al. 2016

CoDAS

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“…The prescriptive gain displayed in the manufacturer's software may be quite different in real ear. Despite the increasing sophistication on hearing aid programming software, simulation data do not replace the probe microphone measurement (22) . Possible complaints about the hearing aid acceptance may be related to the fact that adjustments were made based only on simulated data and not on probe microphone measures.…”

Section: Discussionmentioning

confidence: 99%

Avaliação da percepção de fala em usuários de próteses auditivas após ajuste fino via mapeamento de fala com estímulo em Português

Tonelini

Garolla

Iório

2016

Audiol., Commun. Res.

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Purpose: To evaluate the speech perception of adult hearing aid users pre and post fine tuning based on Speech Mapping in Brazilian Portuguese (SMBP). Methods: Twenty adults aged 18 to 60 years old presenting moderate to severe bilateral symmetrical sensorineural hearing loss and wearing digital hearing aids programmed according to the prescriptive formula National Acoustics Labs, Non-Linear, version 1 (NAL-NL1) for at least six months participated in this study. The test Lists of Sentences in Portuguese (LSP) has been used to evaluate speech perception. The test was applied in two different moments: T1 -before hearing aid fine tuning based on the SMBP and T2 -after fine tuning based on SMBP. The LSP test allowed the Sentence Recognition in Silence (SRTS) and in Noise (SRTN) Threshold calculation and the minimal signal to noise ratio (SNR) required to understand the sentences. Results: There was significant improvement of SRTS and SRTN in moment T2, or after hearing aid fine-tuning, to reach the prescribed targets. In both tests decreased values could be observed; the average SRTS fell from 39.60 dB to 34.41 dB and the signal to noise ratio (SNR) fell from 5.82 dB to 3.34 dB. Conclusion: It was possible to establish a clear link between achieving the prescribed targets and the improvement in speech perception. Hearing aid users performed better on speech perception tests after adjustments of the electroacoustic characteristics of their hearing aids based on the Speech Mapping procedure.

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“…Aarts and Caffee investigated the clinical accuracy of measured and manufacturer-predicted real-ear aided re-sponse (REAR) in adults and reported that these values differed significantly from the predicted response values [9]. Aazh et al (2012) [10] and Campos et al (2011) [11] investigated the fitting accuracy of Real-Ear Insertion Gain (REIG) with the initial fitting of hearing aids in 30 and 62 adults, respectively. They reported that the target insertion gain could rarely be achieved through the first fit.…”

Section: Introductionmentioning

confidence: 99%

Conformity of the Real-Ear Aided Response With the Target Response From the Desired Sensation Level V5 Formula

Pirasteh

Hamzehpour²,

Sharafi³

et al. 2022

IRJ

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Objectives: Real-ear measurements are critical in children for hearing aid fitting. This study aimed to evaluate the conformity of measured and predicted real-ear aided response of prescribed formula of desired sensation level (DSL) version 5, (Pediatric form) in children aged 4 to 7 years. Since there is limited information about the effect of degrees of hearing loss, ethnicity, gender, and ear on this conformity, the present study investigated the influence of the mentioned factors, too. Methods: This study was conducted on 92 children aged 4-7 years (37 girls and 55 boys) with moderate to profound hearing loss. After auditory evaluations, the children’s hearing aids were fitted based on the DSL formula. Then, the hearing aid output was measured with a real-ear measurement system, and the difference between predicted and measured curves were compared. Results: This study showed a significant difference between the predicted values and the measured ones at three intensity level inputs (50, 65, and 80 dB SPL) and a frequency range of 0.5 to 6 kHz for both ears (P<0.05). However, there was no significant difference between predicted and measured values curves (predicted-measured) regarding the effects of the hearing loss degrees, gender, ethnicity, and ear (right or left) (P>0.05). Discussion: According to the difference observed between the predicted and measured curves, especially at the frequencies of 6 and 4 kHz, it is essential to conduct real-ear measurements in children.

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Comparison: real and simulated ear insertion gain

Cited by 5 publications

References 6 publications

Avaliação do protetor auditivo em situação real de trabalho pelo método field Microphone-in-real-ear

Avaliação do protetor auditivo em situação real de trabalho pelo método field Microphone-in-real-ear

Avaliação da percepção de fala em usuários de próteses auditivas após ajuste fino via mapeamento de fala com estímulo em Português

Conformity of the Real-Ear Aided Response With the Target Response From the Desired Sensation Level V5 Formula

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