Sound is something that is produced by vibrations. These are heard by our ears and known to be felt by the persons or creatures even without hearing organ or defective hearing organ.

In Indian tradition there are five varieties of auspicious sounds for any auspicious occasion like marriage, birth etc.

These are -
1. Vedadhvani (the sound of reciting Vedic texts)
2. Vandidhvani (the praises sung by family bards)
3. Jayadhvani (shouts of victory)
4. Shankhadhvani (the blast of conches), and
5. Dundubhidhvani (beat of drums).