Chapter 3: Setting the Hearing Aid Response and Verifying Signal Processing and Features in the Test Box

Abstract

The test box can be used for fitting hearing aids (verifying audibility for the individual), for setting and fine-tuning specific signal processing (e.g., directional microphones, noise reduction, frequency lowering, telecoil responses), and for setting the response for specific accessories (e.g., remote microphones). If you have selected these features for your patient, it is important to make sure they are working properly and turned on. In addition, these tests can help you address specific patient complaints. Let us start by using the test box to pre-set a hearing aid and then we will move on to speech tests of signal processing and features.

Keywords

pre-setting hearing aids - hearing aids - verification - hearing aid signal processing - real-ear aided response - real-ear-to-couple difference - hearing aid test box - audibility - over-the-counter hearing aid

Publication History

Article published online:
17 May 2024

• References

• 1 Scollie S, Seewald R, Cornelisse L. et al The desired sensation level multistage input/output algorithm. Trends Amplif 2005; 9 (04) 159-197
• 2 Keidser G, Dillon H, Flax M, Ching T, Brewer S. The NAL-NL2 prescription procedure. Audiology Res 2011; 1 (01) e24
• 3 American National Standards Institute / Acoustical Society of America. (2018). Specification for Audiometers (S3.6–2018). Accessed April 10, 2024 at: https://webstore.ansi.org/standards/asa/ansiasas32018
• 4 Audioscan. (2021). Audioscan Verifit User's Guide 4.24. Accessed April 10, 2024 at: https://docs.audioscan.com/userguides/archive/Verifit2UsersGuide_4.24.pdf
• 5 S.670 - 115th congress (2017–2018): Over-the-Counter Hearing Aid Act of 2017. ( n.d. ). Accessed April 10, 2024 at: https://www.congress.gov/bill/115th-congress/senate-bill/670
• 6 Medical devices; ear, nose, and throat devices; Establishing Over-the-Counter Hearing Aids. (2022, August 17). Federal Register. Accessed April 10, 2024 at: https://www.federalregister.gov/documents/2022/08/17/2022-17230/medical-devices-ear-nose-and-throat-devices-establishing-over-the-counter-hearing-aids
• 7 American National Standards Institute / Consumer Technology Association. (2017). Personal Sound Amplification Performance Criteria (ANSI/CTA-2051). Accessed April 10, 2024 at: https://webstore.ansi.org/standards/ansi/cta20512017ansi
• 8 American National Standards Institute / Acoustical Society of America. (2020). Specification of Hearing aid Characteristics (S3.22–2014 [R2020]). Accessed April 10, 2024 at: https://webstore.ansi.org/standards/asa/ansiasas3222014r2020
• 9 Katz J. Handbook of Clinical Audiology. 7th ed.. Wolters Kluwer; 2014