swirec_waveform_speech_backoff
                                                    Safety margin extending the BOS and EOS in the waveform.
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                                                                     Value  | 
                                                                
                                                                     Integer: 0–INT_MAX (milliseconds)  | 
                                                            
| 
                                                                     Default  | 
                                                                
                                                                     50  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     Shown in precedence order (see Rules of parameter precedence): Set in the browser, using the Vendor-Specific-Parameters header in a RECOGNIZE or SET-PARAMS method. In Management Station set on the Nuance recognition service. If not using Management Station, set in a Recognizer configuration file (User-nrsxx.xml).  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Rarely used.  | 
                                                            
This parameter is useful for debugging the endpointer, especially in situations that involve very noisy audio.