  In the string theory, the fundamental blocks of nature are not particles but
one-dimensional strings. Therefore, a generalization of this idea is to think
of it as a cloud of strings. Rodrigues et al. embedded the black bounces
spacetime into the string cloud, which demonstrates that the existence of the
string cloud makes the Bardeen black hole singular, while the black bounces
spacetime remains regular. On the other hand, the echoes are the correction to
the late stage of the quasinormal ringing for a black hole, which is caused by
the deviation of the spacetime relative to the initial black hole spacetime
geometry in the near-horizon region. In this work, we study the gravitational
wave echoes of black bounces spacetime surrounded by a cloud of strings under
scalar field and electromagnetic field perturbation to explore the effects
caused by a string cloud in the near-horizon region. The ringing of the regular
black hole and traversable wormhole with string cloud are presented. Our
results demonstrate that the black bounce spacetime with strings cloud is
characterized by gravitational wave echoes as it transitions from regular black
holes to wormholes, i.e. the echoes signal will facilitate us to distinguish
between black holes and the wormholes in black bounces surrounded by the string
cloud.
