Re: beginner

[madl74]

>  so i ask you as a beginner in this domain, to tell me step by step what kind 
> of technique , instruments, p.c. programs,places and prices for buying them 
> to listen to some sounds in forests, fields or rivers( especially fish and 
> insects)

Sorry, I don't have your name. 

I can tell you what we used years ago in the BBC Film Unit before 
hydrophones such as JrF
http://jezrileyfrench.co.uk/
were available. We waterproofed a small moving coil "lavalier" mic using a 
condom, sealed closely around the cable usually with a blob of silicone 
cement. 

We made a point of putting the packet of condoms on our expense sheets and 
they always got passed as they were "one use" devices. :-) 

David Brinicombe