звучни тест звука (10 -20000 Хз) – 60 минута (један сат) линеарне амплитуде – Most relaxing sounds and videos

звучни тест звука (10 -20000 Хз) – 60 минута (један сат) линеарне амплитуде, пуни опсег, бас, средњи и високи – видео спектар и висок квалитет звука.

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