Ultrasonic measurement apparatus for a vehicle, comprising a receiver device which is configured to receive an ultrasonic signal (r(τ)) that was emitted by a vehicle-own ultrasonic transmitter and reflected at at least one reflecting object (16a, 16b, 16c, 18) situated in a transmission path between the receiver device and the vehicle-own ultrasonic transmitter and which is configured to determine and provide a measurement sequence (Δp, Δp, Δp, f, PN1 to PN6, PP1 to PP6) in respect of a time curve of the period durations (PN1 to PN6, PP1 to PP6) of the received ultrasonic signal (r(τ)), wherein the measurement sequence (Δp, Δp, Δp, f, PN1 to PN6, PP1 to PP6) determined by the receiver device comprises a sequence of positive period durations (PP1 to PP6) of the received ultrasonic signal (r(τ)), a sequence of negative period durations (PN1 to PN6) of the received ultrasonic signal (r(τ)), a sequence of positive period duration deviations (Δp, Δp, Δp) of the received ultrasonic signal (r(τ)) from a positive reference period duration and/or a sequence of negative period duration deviations of the received ultrasonic signal (r(τ)) from a negative reference period duration; wherein a positive period duration (PP1-PP6) should be understood to mean a temporal distance between two successive transitions from a smaller value to a larger value of the received ultrasonic signal (r(τ)) in relation to a reference value and a negative period duration (PN1-PN6) should be understood to mean the temporal distance between two successive transitions from a larger value to a smaller value of the received ultrasonic signal (r(τ)) in relation to the reference value; a comparison device, on which a sequence of positive period durations (PP1 to PP6) of the emitted ultrasonic signal (r(τ)), a sequence of negative period durations (PN1 to PN6) of the emitted ultrasonic signal (r(τ)), a sequence of positive period duration deviations (Δp, Δp, Δp) of the emitted ultrasonic signal (r(τ)) from a positive reference period duration and/or a sequence of negative period duration deviations of the emitted ultrasonic signal (r(τ)) from a negative reference period duration is stored as at least one reference sequence (Δp0 to Δp0), and which is configured to compare the determined measurement sequence (Δp, Δp, Δp, f, PN1 to PN6, PP1 to PP6) with the at least one reference sequence (Δp0 to Δp0) and to determine a comparison information item (Δpn to Δpn) in respect of a deviation of the determined measurement sequence (Δp, Lp, Δp, f, PN1 to PN6, PP1 to PP6) from the at least one reference sequence (Δp0 to Δp0); wherein a positive period duration (PP1-PP6) should be understood to mean the temporal distance between two successive transitions from a smaller value to a larger value of the emitted ultrasonic signal (s(τ)) in relation to a reference value and a negative period duration (PN1-PN6) should be understood to mean a temporal distance between two successive transitions from a larger value to a smaller value of the emitted ultrasonic signal (s(τ)) in relation to the reference value; and an evaluation device which is designed to determine an information item in respect of a relative speed of the at least one reflecting object (16a, 16b, 16c, 18) and/or a shape feature of the at least one reflecting object (16a, 16b, 16c, 18) taking account of the determined comparison information item (Δpn to Δpn), wherein redundant evaluation results for mutual plausibility checks in relation to the information item are determined by way of parallel evaluation in time of positive period durations (PP1 to PP6) and negative period durations (PN1 to PN6) and/or parallel evaluation in time of positive period duration deviations (Δp, Δp, Δp) and negative period duration deviations.