11-29-2016, 10:19 AM
If Bose earbuds let you hear sirens (1-3 kHz) then they should be legal. The laws around earplugs and earbuds are confusing in California.
From motorcycle handbook, CA DMV:
To protect against the elements of nature, such as wind, which can cause hearing loss, you may want to use ear protection. The CVC §27400 states a person may not wear a headset covering, earplugs, or earphones in both ears, unless the protectors (earplugs or molds) are specifically designed to reduce harmful (injurious) noise levels. The headset coverings, earplugs, or earphones must not inhibit the wearer's ability to hear a siren or horn from an emergency vehicle or another motor vehicle.
From motorcycle handbook, CA DMV:
To protect against the elements of nature, such as wind, which can cause hearing loss, you may want to use ear protection. The CVC §27400 states a person may not wear a headset covering, earplugs, or earphones in both ears, unless the protectors (earplugs or molds) are specifically designed to reduce harmful (injurious) noise levels. The headset coverings, earplugs, or earphones must not inhibit the wearer's ability to hear a siren or horn from an emergency vehicle or another motor vehicle.