Abstract
In recent years, an increasing research effort has been directed toward remediation
of single-sided deafness. Contralateral routing of signal (CROS) is the longest standing
rehabilitation solution for individuals with single-sided deafness. The primary goal
of CROS technology is to transfer the signal received at the deaf ear to the better
hearing ear, thereby reducing the impact of the acoustic head-shadow. This allows
for individuals with single-sided deafness to regain access to sounds located at the
deaf ear. The hearing deficits associated with single-sided deafness are often debilitating.
While surgical management of single-sided deafness is on the rise, CROS hearing aids
offer a nonsurgical option to compensate for some of the deficits that occur when
a listener is limited to a single ear. Limitations of early CROS devices resulted
in poor adoption and acceptance in those with single-sided deafness. Following significant
advances in both design and technology, the acceptance of CROS devices has increased
in recent years. This paper reviews relevant literature in CROS application for the
management of single-sided deafness. Technological advances, benefits, limitations,
and clinical considerations are also reviewed in this article.
Keywords
CROS - contralateral routing of signal - single-sided deafness - SSD - unilateral
hearing loss - hearing aid
