Frequency is measured in hertz (Hz). A person who has hearing within the normal range can hear sounds that have frequencies between 20 and 20,000 Hz. The most important sounds we hear every day are in the 250 to 6,000 Hz range.
An issue date was added, and cheques may not be valid a certain amount of time after issue. In the US and Canada a cheque is typically valid for six months after the date of issue, after which it is a stale-dated cheque, but this depends on where the cheque is drawn; in Australia this is typically fifteen months.
Definition. Check presented at the paying bank after a certain period (typically six months) of its payment date. A stale check is not an invalid check, but it may be deemed an 'irregular' bill of exchange.A bank may refuse to honor it unless its drawer reconfirms it payment either by inserting a new payment date or by issuing a new check. Also called stale dated check.heck presented at the paying bank after a certain period (typically six months) of its payment date.