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ANC earphone audio - Production Test, Powered by AudioExpert
Background:
The noise reduction effect of ANC headset is determined by two aspects, one is the design of the filter, the second one is a series of gain values of the product. In the RD phase, once the filter design finish (for more RD filter design tools), their will not be changed during the production phase. But during the mass production phase, as the incoming Q mic and loudspeaker quality difference and cavity difference generated during the assembly process, the fixed filter can not garanteed the Noise reduction effect. In order to compensate for these difference, achieve the effect of noise reduction and noise reduction effect of balance, in the mass production phase, a serial of gain value need to be fine-tuned online.
The traditional method is manually adjusted, manually verify, until the noise reduction effect can meet the effect of noise reduction, and then finally, manually burn the gain.
This traditional manual method will cause a series of problems once in the mass production stage:
The adjustment efficiency is low. The average skilled personnel need at least 1~2 minutes, which is a great waste of capacity.
The adjustment precision is low. Because manual adjustment can not be precisely adjusted to the best effect of noise reduction, further more, product consistency is low, and quality can not be controlled, which affects the core competitiveness of products.
The rate of failure is high. For example, AMS chip only have 3 times burning, manual adjustment can not guarantee 100% success, which will lead to an increase the waste of manpower and material resources.
It is no chance to meet the speed requirement of Hybrid product. The hybrid design require FF and FB total 4 registers, it really complicate system. Manually adjustment is unrealistic.
The ANC option of AudioExpert supports the mainstream noise reduction chips, such as AMS, BES, etc. It can automatic adjust a serial of gain, and automatic test and burn the chips on line, further more, base on its sequence editor, user can define other audio test step, such as general frequency response, THD, etc, generate report automatically. MegaSig now has been cooperating with first-rate ANC chip provider, and solution provider, keeping update, creating value for our customers.
Feature:
Automatic adjust gain, automatic verify noise reduction effect, automatic burn the chip;
General audio test supported;
Data stored, traceable;
Sequence totally defined by customer
Benefits
Fast, help customer to lower the production cost;
Universal, ANC & Audio can be test by one station, support almost all main steam ANC chip, help customer to lower the instrument investment;
Accurate, help customer to produce high quality products;
Simple, help customer to lower maintenance cost;
Other Functions:
This systems also support Qmic, Speaker, even Leakage, PCBA filter. etc. audio test.
System Components:
Software UI:
Sequence Editor:
Video:
基于AudioExpert的ANC耳机音频综测系统 - 视频