I. Introduction to Headphones:

銆�銆�Wireless headphones have the middle wire replaced by radio waves. They are connected from the audio outlet of the computer to the transmitting end, and then the transmitting end sends the radio waves to the headphones at the receiving end. The receiving end is equivalent to a radio.

There are known three types of wireless headphones. The first is Bluetooth headphones, the second is infrared headphones, and the third is 2.4G.

Ii. Global Certification and Testing Services for Headphone Products (Partial List)

Iii. EMC Electromagnetic Compatibility Testing Items & Testing Capabilities for Headphone Products

銆�銆�Testing items Radiation (RE)10m Radiation (RE)3m, radiation immunity (RS), radiation spurivity (RSE), Conduction (CE), conduction immunity (CS), disturbance power (DP), three-loop antenna (3Loop), lightning (SURGE), electrostatic discharge (ESD), Electrical Fast Transient burst (EFT), voltage Sag & Short Interruption (DIP), harmonic flicker (H) &F) Three-phase, power frequency magnetic field (MS), Click sound...

銆�銆�Detection capability: Conduction (CE) three-phase: 380V /200A, Radiation (RE)3m single/three-phase: 32A, Radiation (RE)10m three-phase: 380V /200A,DC 1000V/200A, RS field strength: 20V /m, CS field strength: 15V, ESD ±30 kV, Surge: 8 kV...

Iv. RF Wireless Radio frequency Testing Items & Testing Capabilities for Headphones Products

銆�銆�Testing items: Transmission power, power spectral density, occupancy time, duty cycle, adaptive, channel interval, occupied bandwidth, frequency stability, modulation bandwidth, transmission spurring, reception spurring, in-band spurring, reception blocking and bit error rate, dynamic frequency selection, sensitivity, peak power to average power ratio, electromagnetic field EMF...

銆�銆�Detection capabilities: BT/BLE, SRD (433 MHz etc), WIFI 2.4 GHz, WIFI 5 GHz(including DFS radar), Communication 2,3,4G(SISO), WIFI 6E 8*8 MIMO, WIFI 7 16*16 MIMO...

V. EMC Electromagnetic Compatibility &RF Wireless Radio Frequency & Safety Regulations Standards