---
title: NASA Roger Beep
language: en
layout: default
created: 2008-08-11 01:30:57 +0200
updated: 2010-03-12 19:32:32 +0100
toc: false
tags:
  - know-how
  - miscellaneous
  - audio
  - space
---
The "Roger" beep after transmissions from Space missions is @ 2475 Hz for 250 ms. According to [everything2](http://everything2.com/e2node/Roger%2520beep),
there should be a pre-transmission tone @ 2525 Hz for 250 ms. They are called [Quindar tones](http://en.wikipedia.org/wiki/Quindar_tones).
