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.
How Long Do Late Payments Stay on Your Credit Reports? Like collection accounts, late payments can remain on your credit reports for up to seven years and also have a negative impact on your scores. Additionally, both have a lesser impact as they get older. Itâs good to keep in mind that not all late payments are equal.