Blasco and Redleaf (2014) note that otologists around the world have used cochlear implants (CIs) as an effective therapy for people presenting with severe-to-profound sudden sensorineural hearing loss (SSNHL) even though the contralateral ear presents with normal hearing. Blasco and Redleaf report that more traditional therapies such as bone-anchored devices and contralateral routing of signal (CROS) provide only minimal benefit for users and those users do worse in noisy backgrounds.