TOPIC:

<th><?php echo 'Vocal'?></th>  // better to use a text string
...........
<td><?php echo JemHelper::getAttendeeVocal($row->uid); ?></td>

	static public function getAttendeeVocal($userId) 
	{
	    if (empty($userId)) {
	        return false;
	    } else {
	        JLoader::register('FieldsHelper', JPATH_ADMINISTRATOR . '/components/com_fields/helpers/fields.php');
	        $currentUserFields = FieldsHelper::getFields('com_users.user', null , true);
	        
	        $vocalField = array();
	        $fieldId = null;
	        foreach ($currentUserFields AS $field) {
	            
	            if ($fieldName = "vocals") {
	                $vocalField[] = $field->id;
	                $fieldId = $field->id;
	            }
	        }
	        
	        $model = JModelLegacy::getInstance('Field', 'FieldsModel', array('ignore_request' => true));
	        
	        $vocalValue = $model->getFieldValues($vocalField,$userId);
	        $vocalValue = implode(', ', $vocalValue);
	        return $vocalValue;
	    }
	}