During cycling, regular headphones may obstruct the transmission of external sounds, increasing the risk of accidents. However, helmet headphones usually adopt an open design to ensure that riders can hear the sounds of the surrounding environment and improve cycling safety. Soft microphones are generally suitable for full helmets. Hard microphones are suitable for full helmets and half helmets, suitable for all helmets. For riders who ride for long periods of time, wearing comfort is the most important. From a comfort perspective, the material of soft earphones is softer and provides higher wearing comfort. The earmuffs of hard earphones wrap more tightly around the ears, effectively isolating external noise, but are relatively more prone to pressure and may cause discomfort if worn for a long time. Both soft and hard earphones are very important for cycling. However, the sound clarity of these two types of headphones has their own characteristics. Soft earphones generally have excellent sound quality and bass effects, suitable for riders to enjoy music during cycling. Although hard earphones cannot achieve the music effect of soft earphones, they can isolate external noise and allow riders to hear navigation or other important sounds more clearly, improving cycling safety.