Can I use frequency hopping spread spectrum technique for audio steganography?
Yes, it is possible to hide data inside audio files using FSSS technique. Have a look at this publication and this one. 

Since HAS (Human Auditory System) is more sensitive than HVS (Human Visual System), you are usually limited with audio steganography comparing to image steganography. There are not many detalied publications with "Audio Steganography" tag. Interests about hiding digital data inside audio files have tended into watermarking field. So I strongly suggest you to research whatever you are looking for as "Audio Watermarking". You will find more contents related to watermarking.

Few more words about Audio Steganography:

LSB technique provides you more capacity to hide inside audio files, yet it will be very fragile to resist against any attacks such as mp3 compression. According to my experiences, DSSS and Echo Hiding methods are more robust comparing to LSB Coding and Parity Coding. DSSS provides a bit more capacity than Echo Hiding, but the noise is audible comparing to Echo Hiding.