Signal adjectives are listed in this post. Each word below can often be found in front of the noun signal in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing SIGNAL.
abnormal, accustomed, acoustic, actual, adaptive, additional, adequate, agreed, alert, amplified, analog, appointed, appropriate, audible, audio, auditory, average, basic, best, better, biological, bright, busy, cellular, certain, chemical, chief, clear, coded, common, complete, complex, composite, concerted, constant, continuous, correct, corresponding
current, customary, desired, detectable, different, differential, digital, direct, directional, discrete, distant, divine, early, effective, electric, electrical, electromagnetic, electronic, enough, entire, environmental, expected, external, extracellular, faint, false, familiar, famous, fatal, feedback, fi, filtered, final, first, fluorescent, friendly, further, gave
general, go, good, great, green, high, higher, highest, hormonal, immediate, important, incoming, individual, infrared, inhibitory, initial, intermediate, internal, international, intracellular, invisible, key, known, large, last, least, less, light, like, little, local, loud, low, magnetic, main, major, maximum, measurable
measured, military, mixed, modulated, more, most, mr, much, multiple, mysterious, negative, neural, new, next, noisy, nonverbal, normal, observed, obvious, old, only, optical, original, other, overall, own, particular, peak, periodic, physical, poor, positive, possible, potential, powerful, prearranged, preconcerted, primary
private, proper, public, quick, random, raw, real, received, recorded, red, relative, reliable, right, same, sampled, satellite, second, secret, sensory, separate, several, significant, silent, similar, simple, single, sinusoidal, slight, slightest, small, smoke, social, sound, special, specific, standard, statistical, strong
stronger, strongest, subtle, such, sudden, sufficient, sure, telegraphic, terminal, third, time, total, transient, transmitted, true, turn, understood, unique, universal, unknown, unmistakable, unseen, unwanted, up, useful, usual, variable, verbal, video, visible, visual, weak, weaker, welcome, white, wireless, wrong
Hope this word list had the adjective used with signal you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.