Controller Buzzer as Distance Decreases

[Yoriz]

The first thing that jumps out at me is that there is a lot of duplication in the functions distance and distance2 of which the names also give it away.
The only things that differ between them are trigger and echo so these can be passed into a single function.

def get_distance(trigger, echo):
    # set Trigger to HIGH
    GPIO.output(trigger, True)
  
    # set Trigger after 0.01ms to LOW
    time.sleep(0.00001)
    GPIO.output(trigger, False)
  
    StartTime = time.time()
    StopTime = time.time()
  
    # save StartTime
    while GPIO.input(echo) == 0:
        StartTime = time.time()
  
    # save time of arrival
    while GPIO.input(echo) == 1:
        StopTime = time.time()
  
    # time difference between start and arrival
    TimeElapsed = StopTime - StartTime
    # multiply with the sonic speed (34300 cm/s)
    # and divide by 2, because there and back
    distance = (TimeElapsed * 17150)
  
    return distance

then call it as follows

distance1 = get_distance(GPIO_TRIGGER, GPIO_ECHO)
distance2 = get_distance(GPIO2_TRIGGER, GPIO2_ECHO)