HearAdv SoundGrade: The HearAdvisor lab's overall performance grade (A to F) with the overall SoundScore in parentheses. The SoundScore (with 5 being the highest possible score) is weighted from all HearAdvisor test scores, according to what most consumers value most in an OTC hearing aid, as determined by a previous survey.
Sp in Quiet: HearingAdvisor's speech in quiet performance score.
Sp in Noise: The speech in noise performance score.
Feedback: The feedback handling performance score—or how well the hearing aid is resistant to whistling when an object, like your hand or a hat/scarf, is close to the hearing aid.
Own voice: The degree to which the device allows your voice to sound natural and/or to control against the occlusion effect (i.e., plugged feeling or hollow-voice sound). In general, earbud-style devices and others that occlude the ear canal, tend to score worse on this metric.
Streaming: Bluetooth audio streaming quality with music, podcasts, phone calls, etc. In general, earbud-style devices and others that occlude the ear canal (closed fittings) tend to do better on this metric.