Lyrebirds learning artificial sounds

To: Peter Shute <>
Subject: Lyrebirds learning artificial sounds
From: Chris Charles <>
Date: Sat, 13 Feb 2010 15:17:54 +1100
A fair identification of a off-the-cuff pseudo factoid Phillip.
However for a bird flying at 15m/sec & uttering a cry in the 800hz range, the difference between the approaching frequency & the leaving frequency (30m/sec) is about 65hz. Doppler_effect

I am not sure if I can really detect 65hz or 8% change but this is approximately the difference between G5th & F5th http:// Nevertheless I think I perceive a lower frequency as they depart. Similarly with overflying Ravens - the last 'aahhhh' always sounds more mournful than when they are approaching, dont you think?.

Regards, Chris

Chris Charles
0412 911 184

33deg 47'30"S

On 13/02/2010, at 12:07 PM, Peter Shute wrote:

How fast do YTBCs fly? I'm sure I've heard the doppler effect of relatively slow moving cars, but I think the fact that birds don't make a continuous sound would make it hard to detect the effect.

Perhaps people are confusing the rise and fall in loudness with true doppler effect, but either would be equally impressive to hear from a Lyrebird.

Peter Shute

Sent using BlackBerry

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU