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If the noise is very loud it is likely others could hear it. 'Leak proof' headphones would need significant isolation and these are not isolated well at all.
Sorry, there was a problem. Please try again later.The Sony WH-CH720N headphones have minimal sound leakage, especially at moderate volume levels, thanks to their over-ear design. However, if the volume is set very high, some sound may still leak out, which could be noticeable in quiet environments. They do a great job of blocking external noise with active noise cancelation, so your daughter may not need to play the white noise at such a high volume. These headphones should be a good fit for her needs, but keeping the volume at a reasonable level will minimize any potential sound leakage.
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