റെക്കോർഡിംഗ് സ്റ്റുഡിയോ, ഓഡിറ്റോറിയം തുടങ്ങിയ മുറികളുടെ സൗണ്ട് പ്രൂഫിംഗിനായി സാധാരണയായി ഉപയോഗിക്കുന്ന മെറ്റീരിയൽ ഏതാണ് ?
Aപരുത്തി
Bകയർ
Cമരം
Dസ്റ്റൈറോ നുര
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