Declension table of ?dhvana

Masculine	Singular	Dual	Plural
Nominative	dhvanaḥ	dhvanau	dhvanāḥ
Vocative	dhvana	dhvanau	dhvanāḥ
Accusative	dhvanam	dhvanau	dhvanān
Instrumental	dhvanena	dhvanābhyām	dhvanaiḥ dhvanebhiḥ
Dative	dhvanāya	dhvanābhyām	dhvanebhyaḥ
Ablative	dhvanāt	dhvanābhyām	dhvanebhyaḥ
Genitive	dhvanasya	dhvanayoḥ	dhvanānām
Locative	dhvane	dhvanayoḥ	dhvaneṣu

Compound dhvana -

Adverb -dhvanam -dhvanāt