wordpress get attachments that are not images

[admin]

wordpress has really great functions when it comes to image attachments - but I can not find any documentation on how to get attachments that are not images .

for now, I wrote this function :

function ok99_get_post_file_attachment($mime='application/pdf',$limit=-1) {
    global $post;
    $attachments = get_children( array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment','post_mime_type' => $mime, 'order' => 'ASC', 'orderby' => 'menu_order ID', 'posts_per_page'=>$limit) );

    if ($attachments) {
       echo 'Your Attachments : <br/>';
        foreach ($attachments as $att) {
        //$attachment = array_shift($attachments); // debug to delete
        echo wp_get_attachment_url($att->ID) . '<br/>';
        the_attachment_link($attachment->ID, false);}
    }

    return false;
}

my question is : is this the only way to get attachments that are not images ?
Is there any way to do that without another query ??