Words to Describe signals

How signals often is described ("________ signals")

• nuclear
• light
• subtle
• spurious
• auditory
• electronic
• unwanted
• negative
• regulatory
• distant
• necessary
• automatic
• mixed
• intracellular
• clear
• sinusoidal
• emotional
• incoming
• sound
• electromagnetic
• wrong
• seismic
• nonverbal
• conflicting
• environmental
• strong
• modulated
• additional
• digital
• sensory
• time
• discrete
• appropriate
• internal
• transient
• acoustic
• audible
• corresponding
• received
• physiological
• optical
• visual
• hormonal
• periodic
• electrical
• vocal
• positive
• separate
• extracellular
• neural
• wireless
• continuous
• audio
• weak
• false
• verbal
• random
• complex
• external
• busy
• multiple
• level
• electric