Sapphire Acoustics is specialized in design, research & development, producing and selling hearing protection products, such as software defined networking radio and communication systems. It has established a set of hearing solutions based on occupational safety and health. Sapphire Acoustics provides a series of popular hearing protection value-added services, including design, development, testing, application of acoustic filter system, on-spot noise test, frequency analysis, audiology training, hearing protection evaluation, etc. Besides, we are committed to technological innovation in the field of hearing and specialized technical services for you.