Zhongke KingDa specializes in measurement and control research in the field of industrial control. In terms of acoustic measurement and control, we provide customers with a series of solutions for product acoustic performance testing and product research and development acoustic evaluation, including semi-anechoic chambers, full-anechoic chambers, and acoustics A full range of solutions including equipment, measurement methods and acoustic testing.
Full anechoic room application industry: test the sound absorption coefficient of sound-absorbing materials and sound-absorbing structures, measure the noise level and power level of equipment and products, the frequency response characteristics of electro-acoustic components such as microphones and speakers, and the acoustic frequency of musical instruments or precision instruments Characteristic analysis and noise level, etc.
Acoustic effect of full anechoic room: The acoustic effect of full anechoic room is higher than that of semi-anechoic room, generally below 15dB (A), and the precision of the test product is higher than that of semi-anechoic room.
Design standards:
The structure of the full anechoic room is based on the international standard SO3745 "Acoustics-Determination- of sound power levels of noise sourcePrecision--- methods for anechoic and semi-anechoic- rooms" and the standard GB6882 "Acoustics: Measurement of noise source sound power: anechoic room And semi-anechoic chamber precision method" design. At the same time, it meets the requirements of the SO7779 equipment air noise test standard.
• Designable background noise is less than 10 decibels; cut-off frequency is less than 50Hz
• Double-layer sound-proof building, floating damping structure;
• Adopt elastic suspension vibration isolation foundation to isolate vibration. The vibration isolator is located below the floor, and the suspension elastic vibration isolation foundation vibration isolation structure. All-weather anti-interference ability against external noise and vibration
• Fully anechoic room adopts 1500mm sound-absorbing wedge type sound-absorbing body, with precision level of sound field
• In addition to the basic vibration isolator, a vibration isolation trench structure is also used to block vibration waves from the outside.
• It can control the temperature and humidity in the full anechoic room, and set up a ventilation air-conditioning silencing system.
• 360° acoustic free field environment;
• Choose imported instruments or domestic high-quality instruments and microphones;
• The software is simple and convenient to operate and easy to maintain;
The main function of the full anechoic room is to eliminate the interface sound reflection of the sound source, that is, to form a free sound field in the anechoic room. It is achieved by installing a strong sound-absorbing body to absorb sound wedge.
1. The static ring full anechoic chamber adopts a wedge-type sound-absorbing structure.
2. The sound absorption material is environmentally friendly, non-moisture absorption, strong water repellency, good molding, uniform density, low dispersion of sound absorption performance, and it is a fireproof material
3. The sharp split is a two-split structure, and the frame can be made of stainless steel or cold drawn steel wire and sprayed with anti-rust treatment on the surface after welding.
4. In order to increase the sound absorption of the wedge structure at low frequencies, a certain cavity is reserved when the wedge is installed. The cavity size is determined according to the best cavity size during the wedge selection test.