The phrase "audible then" is correct and usable in written English.
It can be used in contexts where you want to indicate that something was heard or could be heard at a specific time in the past.
Example: "The music was barely audible then, but it gradually grew louder as the night went on."
Alternatives: "heard at that time" or "perceptible back then".
Audible then went to Mr. Chang and got him to sell it a license for $70,000.
One way to proceed gently: introduce music so quiet that it's barely audible, then gradually increase the volume each day, leveling off when the two holdouts object.
The new law states that if a doctor terminates a pregnancy without listening for a heartbeat or when a heartbeat is audible, then the physician would be committing a fifth-degree felony and face up to a year in jail, disciplinary action and civil lawsuits.
The factual interpretation is to say when the subject A and reason C are coextensive (e.g., sounds and what is audible) then the problem is that the Cs are not present in the similar instances because such instances must actually be different from A. See Kajiyama (1958), Tillemans (1999, ch. 5).
The loud crack of the first blast was audible, and then came screaming.
Everyone agreed to the prayer audible and then gathered in an auditorium to eat pizza and watch Pettitte pitch.
His piercing voice was more audible back then, often on account of telling a detractor at the front of the Main or Centenary Stand where to go.
If hearing even sounds is not merely a matter of hearing features of acoustic signals or structures, and if it is part of the function of auditory perception to furnish information about distal events on the basis of their audible characteristics, then speech is not entirely unique among things we hear (see also Rosenblum 2004).
The terse ruling was met by an audible gasp, and then shouts of "Shame!
Then Audible came along and started doing consumer downloads, which has taken off in an amazing way".
"You think you've heard the entire song and memorised every audible nuance and then when you go channel by channel and you can hear more".
