If a singer's range is higher or lower than what can be written on the traditional way given you have to use ledger lines to notate those extra notes because they're not within the five-line staff. Ledger lines are extra lines added above or below the staff for notes that are higher or lower than the notes on the staff.
<span>Coosje van Bruggen is the person who collaborated with claes oldenburg to create the sculpture plantoir. She worked in partnership with Coosje van Bruggen.</span>