As the child's brain responds to each sound, non-invasive detectors in the MEG machine analyse the brain's changing magnetic fields.
当孩子的大脑回应每种声音时，脑磁图描记术机器中的非侵入性探测器就会分析大脑中变化的磁场。
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Sound example 8: sound of a grand piano as recorded by a magnetic pickup attached to the strings (string sound alone), followed by the sound in the room, recorded by a microphone (4 notes each).
The double-faced hollow toughened glass provides good sound insulation, heat insulation and safety. Installing power-operated or magnetic control shutter will save you the trouble of curtain cleaning.