Vocal Training Wearable Tech

I'm looking for a skilled developer to create a unique vocal training device that incorporates wearable technology. This device will be designed to fit around the neck, utilizing sensors and Bluetooth tech.

Key functionalities:
- Real-time feedback on vocal performance
- Visual feedback on a connected app

Ideal Skills and Experience:
- Expertise in wearable technology development
- Proficiency in sensor integration and Bluetooth connectivity
- Experience in building user-friendly mobile applications for real-time data display
- Background in audio processing or vocal training technology is a plus

Please provide samples of similar work and a rough timeline for project completion.