Re: High frequency recording

["Raimund" animalsounds]

> Forgive me for my (probably) stupid question.
> I don't understand the correlation between what you're saying and the
> spectogram you're referring to.
> Previous posters on the subject mentioned a 10% security margin between
> the Nyquist frequency and the highest frequencies that might be of interest.
> In your example the ratio between the Nyquist frequency of the recording
> (11.025 kHz) and the highest frequncy of the Blue Tit song (8.7 kHz) is
> 0.789, i.e. 21%.

Hi Serge,

Oops, yes the sample that I just posted was perhaps to very well selected. 
However, it generally does not matter whether the security margin is 21%, 10% 
or even only 5% (in that case we should however take cake of the anti-aliasing 
filter effects). 

Regards,
Raimund