Cap Advanced

This redesign of the headphone specifically aims to help the swimmer with more versatile underwater experience. The wearer can listen to music and receive the coach’s instruction while they are swimming. Instead of wearing a separate headphone, this headphone will be attached to the cap directly.

1. Bone conduction coil
2. Blue tooth stereo module MH-M38
3. LiPo Battery 3.7V
4. Switch
5. Wireless charging receiver and transmitter

Solder wires to the positive and negative sides of the bone conduction coil. Then connect the coil to the bluetooth stereo module. Pay attention to the left channel and the right channel on the module.You need to also add a switch in order to turn the device on and off.

The cap now is waterproofed and the sound underwater is very clear.

The one-way communication can be easily set up with the FOLD BACK function of the smart phone.

Download the "Voice Changer" app and the wearer will be able to hear voices when another person speaks to the phone.

You'll need a wireless charging transmitter and also a receiver. The transmitter has a battery port that allows it to be connected to the charger with a cable. The receiver needs to be connected to the headphone.

In order to make this cap actually functional in the water, all the electronic parts need to be waterproofed. I used a one component rtv silicone and spread it onto all me components. I also changed my switch because the button switch is much easier to be waterproofed. I used a balloon to cover the entire button and then sealed the bottom with the silicon. I then sandwiched the electronics in between two layers of silicon caps.