ANC

With the rapid development of electronic technology, a series of headphones with novel shapes and excellent performance have come into the view of the public. In recent years, the public has become increasingly demanding for noise cancellation performance, and the market of ANC headphones has grown rapidly. The increase in demand naturally requires more supply. At the same time, as the traditional ANC headphone testing process is cumbersome, and its operation is difficult and inefficient, the use of efficient automated test methods can improve efficiency significantly. Our ANC headphone auto-calibration test solution cancels the tedious manual gain debugging steps, leads to stable and reliable test results, and reliably ensures the product quality.

ANC headphone R&D testing

• ANC feed-forward filter (FFF) and feedback filter (FBF) transfer functions (amplitude, phase) testing
• Speaker transfer functions (amplitude, phase) testing
• Microphone transfer functions (amplitude, phase) testing
• Positive + negative noise cancellation performance test

Test parameters

ANC headphone R&D testing	ANC feed-forward filter (FFF) and feedback filter (FBF) transfer functions (amplitude, phase) testing
	Speaker transfer functions (amplitude, phase) testing
	Microphone transfer functions (amplitude, phase) testing
	Positive/negative noise cancellation performance test
Production line auto-calibration test solution	Automatically adjusting the microphone gain to the optional value（e.g. using Trimbox）
	Automatically adjusting the right/left balance of ANC and headphone
	Positive/negative noise cancellation performance

Configuration list

CRY6151B Electroacoustic Tester	X1	Standard
Trim Box	X1	*Optional*
721 Shielding Box (Loudspeaker)	X1	Standard for headset
CRY711 Ear Simulator	X2	The standard for in-ear phone
CRY318 Ear Simulator	X2	Standard for headset
CRY332 Measurement Microphone	X2	Working with Ear-318
CRY506 Preamplifier	X2	Standard for headset
CRY508 Preamplifier	X2	The standard for in-ear phone
PC	X1	*Optional*
CRY801 Testing Jig	X1	Optional / Customized
CRY Electroacoustic Testing Software (including Bluetooth module)	X1	Standard
CRY333 Measurement Microphone	X1	*Optional*
CRY5611 Sound Level Calibrator	X1	*Optional*