Dial Tune

Thought for the day…

A standard dial tone is made up of two simultaneous frequencies: 350Hz and 440Hz. As any musician will tell you, 440Hz is the A above middle C – the concert pitch standard adopted in the 1930s. 350Hz is the F just below it.

Some modern phones (such as my DECT cordless handsets) generate their own dialtone, which for some reason is at a different pitch, and mobiles, of course, don’t have one at all, but if you lift the receiver on a standard landline, you should be able to recognise the two notes.

So if you find yourself needing to tune an instrument, or set the pitch for a choir, but you don’t have a tuning fork handy, just turn to the nearest telephone!

Enjoyed this post? Why not sign up to receive Status-Q in your inbox?

Got Something To Say:

Your email address will not be published. Required fields are marked *

To create code blocks or other preformatted text, indent by four spaces:

    This will be displayed in a monospaced font. The first four 
    spaces will be stripped off, but all other whitespace
    will be preserved.
    Markdown is turned off in code blocks:
     [This is not a link](http://example.com)

To create not a block, but an inline code span, use backticks:

Here is some inline `code`.

For more help see http://daringfireball.net/projects/markdown/syntax


© Copyright Quentin Stafford-Fraser