hi

what mean by one decade one octave​

?

 

Have you tried typing this exact question, bad grammar and all, into Google?

Google: what mean by one decade one octave

and you don't even have to follow any links. The answer to both questions is in the teaser for the very first hit.

You need to start learning to search for answers to your questions and THEN come to places like this and ask for follow-up.

 

I'm feeling big hearted tonight.
A decade is the range of numbers between two successive powers of 10. eg 1 to 10 10 to 100 and 100 to 1000 are all decades.

An octave is the range of numbers between successive powers of 2. eg 32 to 64 or 64 to 128

 

I think it's any range of ten or two, respectively.

So from one musical note A to the next is one octave and from one C# to the next is also an octave.

Similarly, from 14.5 to 145 is one decade.

 

Sure, the base value is arbitrary but for any given base value the other end of the range is 2 times greater for an octave or ten times greater for a decade. You could also fix the upper end of the range in which case the lower end would one half or one tenth respectively.

 

thank you ...