The　excitation　and　reception　of　higher　order　longitudinal　modes　are　investigated　experimentally.　According　to　Snell＇s　law　and　phase　velocity　dispersion　curves,　incident　angles　and　excitation　frequencies　of　angle　beam　probes　are　chosen,　and　then,　the　wanted　subsequently　higher　order　longitudinal　modes　are　excited　in　pipes.　However,　it　will　become　more　difficult　to　control　excited　modes　as　the　order　and　excitation　frequency　of　longitudinal　modes　become　higher.　Furthermore,　the　influence　of　the　number　of　excitation　angle　beam　probes　on　mode　choice　is　analyzed.　Experimental　results　show　that　it　is　essential　to　suppress　flexural　modes　by　increasing　the　number　of　excitation　angle　beam　probes.