Earbud with Low Enoise

An earbud comprising:

• a flexible printed circuit (FPC) having first, second, and third regions, the second region being between the first and third regions, the FPC having connectors configured to couple to components along a battery-voltage (VBAT) loop in the first region, the FPC having the VBAT loop routed within the first region, the VBAT loop having a dedicated ground return within the first region;
• a battery connected to the FPC in the first region and disposed between the first and second regions;
• and
• a speaker connected to the FPC in the second region and disposed between the second and third regions, the second region having a middle disk area aligned with a speaker yoke of the speaker, the second region having a power trace and a signal trace routed around the middle disk area.

An electronic device comprising:

• a battery;
• a speaker;
• a flexible printed circuit (FPC) connecting the battery and the speaker, the FPC having a middle disk area disposed directly between the battery and the speaker, the middle disk area having a ground coverage greater than a threshold;
• and
• power and signal traces on the FPC that do not overlap with a speaker yoke area of the speaker, the power and signal traces routed to produce a first H-field emission that substantially cancels a second H-field emission generated by the battery.