At Voyc Connect™ we always ensure for the best quality product reaches to the customer. And to fullfil this comittment our headsets goes through different quality checks and testing process.
headphones R / L sensitivity, phase (polarity), impedance value, frequency response curve, R / L channel inversion, R / L unbalance, short circuit, open circuit, distortion and other items. The company will set the specification test range according to the requirements of the headset customers. Higher-end headsets will increase the test distortion, and some parameters will be more stringent. For example, some general customers require a test frequency of 100Hz-5KHZ or 50Hz-10KHZ. The high-end headsets require very high indicators and the test requires frequency 20-20KHZ range, R / L balance ≤1dB, total harmonic distortion <0.1% and other indicators must meet the requirements. This is much higher than the international standards for high-fidelity headphones.
Headset listening test items: you can check whether the headsets have noise, abnormal sound, R / L channel inversion, low sound, silent, short circuit, R / L common, etc. The voltage and frequency can be adjusted according to different speakers.
Simulate answering the phone, MIC must not have current sound, silent, screaming.
Determine the positive and negative phases of the speakers.
It helps for long product life and loss of investment of customer due to product failure.
Wire should not ne tangled or too loose, it must be free of any defects like cut, burn or Injection moulding defects.
Red core wire, green core or blue core wire correspond to the speaker "+" pole welding (general speaker supplier "+" dotted), another yellow core wire welding "-", in addition, the welding quality can not be cold welding, virtual welding, Defective welding, etc. If the core wire is reversed, the phase of the headset will be reversed, and everyone knows that the sound of the earphone with reversed-phase is divergent. The earphone vibrates when it is used. If there is cold welding or virtual welding, it will cause poor contact or become silent.
Focus on controlling the reverse of welding, cold welding quality, and poor soldering
The performance test is mainly the test items of the electroacoustic tester and the headset listening inspection. It can be said that these engineering stations are the most critical stations to ensure that the headsets meet the standard and are shipped to consumers. (For details, see the content of the above test items)
Focus on confirming major quality problems such as missing parts, mixed materials, and wrong materials. Of course, other appearance problems should also be checked.
After qualifying all of these checks and test, our headsets are ready for the customer uses.