Universal Adversarial Perturbations for Speech Recognition Systems

First Set (|V|_∞ = 100): -42 dB distortion between original and perturbed audio

• Example 1
  • Original
    [Click to Show Transcription] “the attica should discuss possible approaches to image vegistration”
  • Original + Uniform Noise
    [Click to Show Transcription] “the adica should discuss possible approache to imag wegstration”
  • Original + Universal Perturbation
    [Click to Show Transcription] “and who have been the ad clusy discuss pos blol opprhats to in theh widh trat unsis lyea”
• Example 2
  • Original
    [Click to Show Transcription] “you count do that to me”
  • Original + Uniform Noise
    [Click to Show Transcription] “you can't do that tem”
  • Original + Universal Perturbation
    [Click to Show Transcription] “and who have yeed ot lo nout a ea ”

Second Set (|V|_∞ = 150): -38 dB distortion between original and perturbed audio

• Example 1
  • Original
    [Click to Show Transcription] “the boy was getting irritated”
  • Original + Uniform Noise
    [Click to Show Transcription] “the boy as getting ilicated”
  • Original + Universal Perturbation
    [Click to Show Transcription] “you know to ma the voi es geting eli cate”
• Example 2
  • Original
    [Click to Show Transcription] “and i better read your books said the bo”
  • Original + Uniform Noise
    [Click to Show Transcription] “aare ni' better read your wooks said the bo”
  • Original + Universal Perturbation
    [Click to Show Transcription] “you know to make it an it verter readyour whoks says e voi would a”

Third Set (|V|_∞ = 200): -36 dB distortion between original and perturbed audio

• Example 1
  • Original
    [Click to Show Transcription] “all i thow with an army said the boy”
  • Original + Uniform Noise
    [Click to Show Transcription] “all i thaw with an arny sad the voce”
  • Original + Universal Perturbation
    [Click to Show Transcription] “and from the tective all i thowg with an vogny tatin o lit for to”
• Example 2
  • Original
    [Click to Show Transcription] “its sort of makes a fellow lose faith an himself”
  • Original + Uniform Noise
    [Click to Show Transcription] “it sort of lafe the fellow lose fathan an velf”
  • Original + Universal Perturbation
    [Click to Show Transcription] “and from the tective of e t sort of mates the fellow lose tathin imshol”

Fourth Set (|V|_∞ = 300): -32 dB distortion between original and perturbed audio

• Example 1
  • Original
    [Click to Show Transcription] “something teril y important happened”
  • Original + Uniform Noise
    [Click to Show Transcription] “something teily infoled int hefpene”
  • Original + Universal Perturbation
    [Click to Show Transcription] “aftr anything i hy ei w o the garid osis the hilely really os”
• Example 2
  • Original
    [Click to Show Transcription] “he should see the ther guy presivycly how good at fiveeng hes”
  • Original + Uniform Noise
    [Click to Show Transcription] “e yould see ye thergi asiftetl ha wut theur fite yes”
  • Original + Universal Perturbation
    [Click to Show Transcription] “after at e sios see the legied likescesen thi ly wit o hu good after firing hes ic o”