In many cases the range of frequencies used are also very different.
The average noise power in the frequency range of interest.
Rather, reflection is usually for a large range of frequencies.
He couldn't tell that the frequency range had been altered.
A creature that big couldn't hear far into the human range of frequencies.
In general, signals can be described as including a whole range of different frequencies added together.
Many systems are characterized by the range of frequencies to which they respond.
It is therefore very important to specify the frequency range.
Phone line quality has also continued to improve, so more tones can be used over a greater frequency range.
This introduces noise into the record, particularly in the lower frequency range.