1 M or m â prefix designating a number in thousands (not to be confused with SI prefix M for mega-or m for milli).
There are two types commonly referred to as: 'Shallow' and 'Deep' water. The differences are not only in the Frequency but also in the Beam Width and they are as follows: 'Shallow' water HST-WSBL 106-72 Transducer will operate on 2 frequencies on the HDS models: 200 (20Â°) & 83KHz (60Â°). 'Deep' water HST-DFSBL 106-77 Transducer will operate on 2 frequencies on the HDS models: 200KHz (12Â°) & 50KHz (35Â°).
The frequency range of Theta waves is typically between 5 and 8 cycles per second. We experience Delta waves when we are in deep dreamless sleep. Our brain frequency in this state is very slow and of the greatest amplitude.The frequency range is usually somewhere between 1.5 to 4 cycles per second.