FWIW.......
A quick glance sideways can just be checking the source of a distraction to assess for threat or interest. It can also be done to show irritation ('I didn't appreciate that comment!').
Looking to the left can indicate a person recalling a sound. Looking to the right can indicate that they are imagining the sound. As with visual and other movements, this can be reversed and may need checking against known truth and fabrication.
A quick glance sideways can just be checking the source of a distraction to assess for threat or interest. It can also be done to show irritation ('I didn't appreciate that comment!').
Looking to the left can indicate a person recalling a sound. Looking to the right can indicate that they are imagining the sound. As with visual and other movements, this can be reversed and may need checking against known truth and fabrication.