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Design Example: Vintage Mixing Console01:17

Design Example: Vintage Mixing Console

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A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Pilot Cap Acoustic Transparency for Pediatric Amplification Devices.

Kimberly Scherer1, Erin Christianson2, Xing Wang3

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Summary

Pilot caps do not significantly affect hearing aid acoustic transparency in children. This study supports using pilot caps for better hearing device retention in pediatric hearing loss cases.

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Area of Science:

  • Audiology
  • Pediatric audiology
  • Hearing device technology

Background:

  • Consistent hearing device use in children with hearing loss presents challenges for families.
  • Pilot caps are common accessories recommended to improve hearing aid retention.
  • Limited data exists on the acoustic transparency of pilot caps with hearing aids.

Purpose of the Study:

  • To measure the acoustic transparency of hearing aids when used with pilot cap accessories.
  • To assess the impact of pilot caps on aided speech access.

Main Methods:

  • Used Verifit 2 Hearing Aid Analyzer and Speech Intelligibility Index (SII).
  • Tested four common pediatric hearing aids with four pilot caps.
  • Collected SII data for simulated sensorineural hearing losses at two intensity levels.

Main Results:

  • No significant difference in acoustic transparency (SII) between hearing aids alone and with pilot caps.
  • No significant difference observed between different pilot caps used with the same hearing aid.
  • 80 total SII measurements were conducted, comparing 16 control conditions with 64 test conditions.

Conclusions:

  • Pilot cap use does not significantly alter the acoustic transparency of tested hearing aids.
  • Findings support the use of pilot caps for enhancing hearing device retention in children with hearing loss.