QC Unique Feature - Avoiding False Rejects and Repeating Test Automatically
It is recommended that during QC testing on the production line, a second microphone should be added, along with a test box, to isolate production noise and vibration. This will help monitor the noise level and accurately determine if the measurement is corrupted due to noise disturbance, rather than showing a false negative result and labeling the Device Under Test (DUT) as defective. Nevertheless, the verdict can be "NOISE" due to environmental noise disturbance. The conventional method is to repeat the test until completely undisturbed, which is unsuitable for modern automated production lines and increases measurement time and costs. But what if there was a way to automatically repeat this test of the disturbed results?

To mitigate production noise, various strategies can be employed. A passive solution is to use a test box that isolates noise and vibration in the workshop. A well-designed test box can attenuate disturbances up to 40dB, which is enough for amplitude frequency response and in most cases for THD, but not sufficient for impulsive distortion such as Rub&Buzz.

» Read more to learn how smart repeating and splicing technology can be a key element of ultra-fast testing, providing immunity against random production noise.

Typical Endurance Test Applications - Continuous Testing
The main goal is to perform a test signal with constant power applied to the device(s) under test for a specified time (10, 100, or even 1000 hours). This constantly monitors coil and magnet temperature, input power and current to assess the steady-state performance and evaluate the impact of the stress applied. Read more about one of the measurement examples of our KLIPPEL Endurance Test (KET).

» Read more and explore the capabilities of KLIPPEL Endurance Test on your own with our complimentary example data.

International Symposium on Electroacoustic Technologies (ISEAT)
Visit KLIPPEL at ISEAT, scheduled for November 2-3, 2024, in Shenzhen, China. In our presentation session at ISEAT, we will explore acoustic measurement techniques for TVs, monitors, flat screens and loudspeakers with distributed sound sources.

Contrary to the trend of creating smaller loudspeakers, modern sound techniques involve exciting panels, screens, or other existing mechanical structures with shakers, or using multiple transducers in loudspeaker arrays for beamforming, beam-steering and other 3D applications. These large loudspeakers on their surface have distributed sound sources, generating a complex near field and a unique directivity pattern in the far field.

Additionally, we will address the physical challenges and practical solutions related to the new IEC 60268-23 standard.