code: public String sample_frequency_string()
  	{
  		switch (h_sample_frequency)
  		{
  	    case THIRTYTWO:
  	  	if (h_version == MPEG1)
  	  		return "32 kHz";
  	  	else if (h_version == MPEG2_LSF)
  	    	return "16 kHz";
  	    else	// SZD
  	    	return "8 kHz";
  	    case FOURTYFOUR_POINT_ONE:
  	  	if (h_version == MPEG1)
  	  		return "44.1 kHz";
  	  	else if (h_version == MPEG2_LSF)
  	    	return "22.05 kHz";
  		else	// SZD
  	    	return "11.025 kHz";
  	    case FOURTYEIGHT:
  	  	if (h_version == MPEG1)
  	  		return "48 kHz";
  	  	else if (h_version == MPEG2_LSF)
  	    	return "24 kHz";
  		else	// SZD
  			return "12 kHz";
  	  }
  	  return(null);
  	}
docs: Returns Frequency
  @return frequency string in kHz