The phrase "a simple announcement" is correct and usable in written English.
It can be used when referring to a straightforward or uncomplicated statement or notification.
Example: "We would like to make a simple announcement regarding the changes in our meeting schedule."
Alternatives: "a brief notice" or "a straightforward statement".
A simple announcement in September 1995 signalled the end of the most remarkable career in racing history.
When Edwards began his news conference today, he had a simple announcement for the opening game: "Injury-wise, Pennington is out and everyone else is in".
The president did sign the bill sometime today, doing so without ceremony or even a simple announcement by the White House.
He let another retiring Yankee, Mariano Rivera, have the spotlight all season, in every city, and said he planned to retire with a simple announcement the day after the season.
Standing before a microphone in the blazing sunlight on the station's front steps, Doran Dalton, the chairman of the Hopi Foundation, opened the first broadcast day of Indian country's newest radio station with a simple announcement: "You're listening to KUYI".
Instead, there will be a simple announcement at a news conference, and the car will be parked on the street in front of the convention center, available for short test drives by journalists through downtown Detroit.
Just a few simple announcements by officers on bullhorns could have provided us some basis for action.
Like most national and international "days", it is a consciousness-raising device: the simple announcement of the day does most of the work.
I'm sure she didn't expect this outburst from her simple announcement that a biopsy was in order.
You might find a simple death announcement or report on the funeral.
Mastering narrative is also hugely important: look at Apple's Steve Jobs and the way he manages to create a media circus out of a simple product announcement.
