loudspeaker
noun
                                                                                                                            
                                                            loud·speak·er
                    
                                                                                                              
                                                                                                                                  ˈlau̇d-ˌspē-kər  
                                                      
                                                          
            
                                
              
          
                                                      : a device that changes electrical signals into sounds loud enough to be heard at a distance                                      
                
                    
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  Merriam-Webster unabridged




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