Diamond speaker domes assisted speaker sound quality improvement

With the improvement of quality of life, people's requirements for the sound quality of sound equipment are becoming higher and higher. How to ensure the sound fidelity of high pitched speakers is a key research direction in the material and electroacoustic fields at home and abroad. Due to the significant impact of high pitched sound waves on the speaker diaphragm, higher requirements are placed on the quality of the speaker diaphragm in order to achieve accurate and undistorted high pitched effects. The quality of the speaker diaphragm mainly depends on the stiffness, internal damping, and mass of the diaphragm.

Diamond speaker domes, as a new type of high-frequency diaphragm material currently under hot research and development, has a high elastic modulus and low mass density. It is the material with the fastest sound wave propagation speed, with a longitudinal wave sound speed of up to 18000m/s, which is more than three times that of commonly used diaphragm materials AI and Ti. The speaker dome with a diameter of 26mm prepared using diamond has a separation frequency of up to 70kHz, which is more than twice that of AI and 40% higher than Be, making it an ideal material for producing high fidelity acoustic devices.

Compared with several types of high pitched speaker diaphragm materials in terms of sound velocity and elastic modulus, diamond speaker dome has significant advantages, and its internal damping is also greater than Be. The extremely high sound velocity greatly increases the resonance frequency of diamond diaphragm, preventing harmonic components from appearing after reaching a certain frequency, thereby ensuring the authenticity of sound restoration.

Diamond speaker dome also has extremely high thermal conductivity, making it easy to dissipate the heat generated by the voice coil into space through the diaphragm, thereby increasing the input power that the speaker can withstand and avoiding burning the voice coil or changing the speaker impedance due to long-term high-power input, which affects the accuracy of sound positioning.

The frequency of the segmented diaphragm is high, the total harmonic distortion is small, and the power bearing capacity is high. The excellent acoustic characteristics of CVD diamond can give the tweeter unparalleled sound reproduction function, achieving the effect of "sound in its environment".

The application of diamond dome has the following advantages:

1. The fastest sound propagation rate;

2. High elastic modulus;

3. Good acoustic damping characteristics;

4. Lower mass density;

4. High fidelity;

5. Maximum hardness;

6. Excellent high-frequency response characteristics

CSMH focuses on the research and production of diamonds. The surface roughness of diamond wafer growth surface Ra<1 nm, and the thermal conductivity of diamond heat sinks can reach 1000-2000W/m.k. Multiple core product technical indicators have reached international leading levels. Centered around the excellent acoustic properties of diamond, CSMH continuously promotes the efficient application of diamond in fields such as high fidelity speakers, surface acoustic wave devices, and acoustic sensors.