      
%% ==========================================================================

POLICE_RADAR(4000)   

% ENTER A VALUE BETWEEN 1000-7000Hz in the brackets () to keep the
% reflected frequency within a realistic range

%% --------------------------------------------------------------------------
                     
DOPPLER_SHIFT_APPROACHING(1000,150) 

% (emitted frequency in Hz, velocity of source in m/s)

%% --------------------------------------------------------------------------

DOPPLER_SHIFT_RECEDING(1000,150) 

% (emitted frequency in Hz, velocity of source in m/s)

%% --------------------------------------------------------------------------

DOPPLER_SHIFT_PASSING(200,1000) 

% (actual velocity m/s, emitted frequency Hz)

%==========================================================================