What is the difference between headphones and ordinary headphones in the Grade 4 listening test?

1, sound insulation: headphones compared to ordinary headphones, sound insulation effect is better, can better isolate the outside world noise, so that the candidates are more focused on listening to the test, listen to every word and sentence.

2, headset stability: headset compared to ordinary headphones, more stable, not easy to fall or loose, so you can avoid unnecessary interference and influence in the test.