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The Nuance Audio Hearing Aid Software is a software-only mobile medical application that is intended to be used with compatible wearable electronic products. The feature is intended to amplify sound for individuals 18 years of age or older with perceived mild to moderate hearing impairment. The software utilizes a preset fitting strategy and is adjusted by the user to meet their hearing needs without the assistance of a hearing healthcare professional. The device is intended for Over-the-Counter use.

The Nuance Audio Hearing Aid Software is a software-only device that is comprised of a pair of software modules which operate on two separate required products: (1) Nuance Audio Application on a compatible iOS or Android product, and (2) Nuance Audio Hearing Aid Software Firmware (FW) using the compatible wearable electronic computing platform, the Nuance Audio Glasses (smart glasses). The Nuance Audio Hearing Aid Software amplifies sounds for adult users, 18 years of age and older, who have a perceived mild to moderate hearing loss. The Nuance Audio™ App, iOS or Android mobile application, quides the user through the initial onboarding and set up process providing step-by-step instructions to guide the users can select from four preset options, which are generated from typical mild to moderate hearing loss configurations (Urbanski et al., 2021) with NAL-NL2 gain settings applied. The user may also adjust the overall volume, noise reduction, and microphone directionality. The device incorporates a feedback control algorithm to reduce the likelihood of the user experiencing acoustic feedback. The same amplification settings will be applied to both the left and right ear. This device can be fitted by a user without assistance from a hearing healthcare professional.

The Hearing Aid Feature is a software-only mobile medical application that is intended to be used with compatible wearable electronic products. The feature is intended to amplify sound for individuals 18 years of age or older with perceived mild to moderate hearing impairment. The Hearing Aid Feature utilizes a self-fitting strategy and is adjusted by the user to meet their hearing needs without the assistance of a hearing healthcare professional. The device is intended for Over-the-Counter use.

The Hearing Aid Feature (HAF) is a software-only device that is comprised of a pair of software modules which operate on two separate required products: (1) HAF iOS Application on a compatible iOS product, and (2) HAF software (i.e., firmware) on the Apple AirPods Pro 2. Refer to Figure I, middle and right, respectively, The AirPods Pro 2, formerly named AirPods Pro (2nd generation), supported this granting and are hereafter simply referred to as "AirPods Pro" in this document. The HAF iOS Application guides users through the onboarding and setup process for the HAF. The process is self-guided by the user and includes step-by-step instructions and informational content (e.g. warnings, instructions for use). To initiate HAF setup, the user must select a saved audiogram from the iOS HealthKit. Once the audiogram has been imported by the HAF, the feature will configure the amplification for the user's audiogram based upon Apple's proprietary fitting formula. Once the initial set-up is complete, users can listen with the HAF using the AirPods Pro and refine their settings. Fine tuning is facilitated by user controls on the iOS device that can adjust amplification, tone, and balance. A user can access the fine tuning settings at any time after setting up the HAF. The HAF settings are transferred to the HAF Firmware Module on the AirPods Pro. The HAF Firmware Module utilizes the general purpose computing platform features of the AirPods Pro, including the microphone, speakers, amplifiers, and audio processing software, to process incoming sound and provide amplification at a specific frequency and gain based on the user's custom settings. The user's custom settings are stored on the HAF Firmware Module and will be available even when the AirPods Pro are not connected to the iOS device.