H. Sridhar (Sridhar Hariharan/H.Padmanabh) was a sound engineer from India and known for his work with the Indian Musician A R Rahman.

Sridhar was the Chief Audio Engineer at Media Artists Chennai. A mathematics graduate, with keen interest in electronics and formal music training, he started a professional sound engineering career in 1988. Having pioneered the use of Digital Sound for Indian films in the DTS format, Sridhar successfully completed six-track surround sound mixing for more than 200 films. He worked closely with directors like Mani Ratnam, K Balachandar, Bharathiraaja, Shankar, Kamal Hassan, P C Sreeram, Priyadarsan, Sibi Malayil and Ramgopal Varma.

Sridhar also engineered and mixed albums for international artists like George Harrison of The Beatles, John Neptune Kaizan, Pandit Ravi Shankar, Zakir Hussain, L.Shankar and John McLaughlin (Mahavishnu Orchestra & Shakti fame).