# lsof -c asterisk | grep sounds ; date
mån feb  2 11:52:46 CET 2009

After calling an extension that goes to this:
exten = s,1,Answer
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Background(queue-seconds)
exten = s,n,Hangup


# lsof -c asterisk | grep sounds ; date
asterisk 25844 asterisk   34r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   35r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   36r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   37r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   38r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   39r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   40r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   41r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   42r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
asterisk 25844 asterisk   43r   REG              254,2     6947  362217 /var/lib/asterisk/sounds/en/queue-seconds.alaw
mån feb  2 11:56:24 CET 2009