The cochlear implant signal-processing strategy in which brief pulses are presented to each electrode in a nonoverlapping sequence is known as

The cochlear implant signal-processing strategy in which brief pulses are presented to each electrode in a nonoverlapping sequence is known as

• A. Feature extraction
• B. Continuous interleaved sampling
• C. Fine structure
• D. Current steering

Answer: (B)

Interleaved stimulation across electrodes is the key idea. Continuous Interleaved Sampling delivers brief pulses to each electrode in a rapid, nonoverlapping sequence, so neighboring electrodes aren’t stimulated at the same time. This separation helps reduce current spread between channels and preserves the temporal envelope information derived from the acoustic signal, which is what the processor uses to convey speech and other sounds. In practice, the device first extracts the envelope from each frequency band and uses that envelope to modulate a train of brief electrical pulses sent to the corresponding electrode in turn. The “continuous” part refers to the ongoing sequence of pulses across electrodes, while “interleaved” highlights that stimulation is staggered to avoid overlap. Other strategies focus more on preserving fine structure or on shaping current between electrodes (current steering), rather than the nonoverlapping, time-staggered delivery that defines this approach.

Interleaved stimulation across electrodes is the key idea. Continuous Interleaved Sampling delivers brief pulses to each electrode in a rapid, nonoverlapping sequence, so neighboring electrodes aren’t stimulated at the same time. This separation helps reduce current spread between channels and preserves the temporal envelope information derived from the acoustic signal, which is what the processor uses to convey speech and other sounds.

In practice, the device first extracts the envelope from each frequency band and uses that envelope to modulate a train of brief electrical pulses sent to the corresponding electrode in turn. The “continuous” part refers to the ongoing sequence of pulses across electrodes, while “interleaved” highlights that stimulation is staggered to avoid overlap. Other strategies focus more on preserving fine structure or on shaping current between electrodes (current steering), rather than the nonoverlapping, time-staggered delivery that defines this approach.