airpods pro buzzing sound in left earbud
There is a buzzing or washing out sound in my left earbud only on phone calls.
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Apple has a service program for AirPods Pro manufactured before October 2020 that experience crackling or static sounds while taking phone calls.
If your AirPods Pro were manufactured before October 2020 and were purchased in the last three years, you may qualify for this service program. You can learn more here: AirPods Pro Service Program for Sound Issues - Apple Support