What does 叫 mean in 你家的门真难叫? From my grade-3 语文 textbook, we find:


每天早晨，敲门的声音总把哥什提亚和娃丽吵醒。这是邮递员送报纸来了。有一次，邮递员对爸爸说：“同志，你家的门真难叫，最好挂一个信箱。”
My translation: Every early morning, a knocking sound noisily awakens Gostia and Wali.  This is the postal worker delivering the newspaper.  One time, the postal worker told my father: &quot;Comrade, your house's door is really 难叫, it'd be best to hang a letter box.&quot;

I don't understand what 叫 means in the last sentence.  The context suggests something along the lines of the door makes an unpleasant noise, although I would write 难听 rather than 难叫.

叫 (jiào)
CC-CEDICT: to shout / to call / to order / to ask / to be called / by (indicates agent in the passive mood)

This definition doesn't seem to fit into the context.
Question: What does 叫 mean in 你家的门真难叫?
Google Translate translates 你家的门真难叫 to &quot;your door is really hard to call&quot;, but &quot;calling&quot; a door doesn't make sense to me.
叫门means knock the door or using other method to tell the people in room to open the door.