The PC speaker is normally meant to reproduce a square wave via only 2 levels of output (the speaker is driven by only two voltage levels, typically 0 V and 5 V).
For example, if your payments for March and July 2010 were each one month late, the report may continue to show (for seven years from the date after each payment was due) that you were 30 days late twice in 2010, even though the tradeline for that account also shows your payments for the rest of 2010 were made on time.
A late payment can significantly drop your credit score! How long do late payments stay on your credit report? As with most negative items on your report, late payments can remain on your credit report for 7 years. However, they will usually only impact your credit score for up to 3 years. In this article we will explain how late payments affect your score and how you can avoid getting late payments in the first place.