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Speech production and perception tools for real-time assessment, analysis and therapy


Laryngograph® > products > speech studio > full system specifications


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speech studio full system specifications

Speech Studio Specifications

Laryngograph® PROCESSOR:

Microphone: Omnidirectional (pressure sensitive) electret, +/- 2dB 100Hz to 10kHz noise level 26dB (SPLA), dynamic range 88dB
Laryngograph®: Gold plated electrodes in small, medium and large sizes
Output voltage range: 5V peak-to peak
Output impedance: 600 Ω
Bandwidth: +/- 1dB, 1Hz to 10kHz


Analog inputs: 4 channel, +/- 5V, 16-bit A to D, 90dB dynamic range
Sampling rate: 24, 16, 12kHz
Analog outputs: Speech and Lx waveforms, 16 bit D to A, speaker or headphone
PC Interface: USB 2.0

  • record speech and Laryngograph® and optionally up to two more waveforms to hard disk
  • real time display of waveforms, fundamental frequency (Fx), amplitude (Ax), frication, contact quotient (Qx), spectrogram and LPC spectrum
  • high quality playback
  • display of fundamental frequency (Fx) and/or closed quotient (Qx)
  • pattern display combining Fx, amplitude (Ax), frication and optionally nasality
  • realtime acoustic spectrogram with narrowband (40Hz) or broadband (200Hz) resolution
  • realtime display of formants via LPC spectrum
  • Sustained vowel analysis
    – Minimum, maximum, average and SD for Fx and Qx
    – Jitter (%)
    – Shimmer (% and dB)
    – HNR (harmonic to noise ratio)
    – NNE (normalised noise equivalent)
    – RAP (relative amplitude perturbation)
  • Connected speech analysis (QA)
    – First and second order frequency distribution (DFx1 and 2)
    – Pitch crossplot (CFx) with irregularity score (%)
    – First and second order closed quotient distribution (DQx1 and 2)
    – Closed quotient crossplot (CQx) with irregularity score (%)
    – First and second order amplitude quotient distribution (DAx1 and 2)
    – Amplitude crossplot (CAx) with irregularity score (%)
    – Speech pattern elements – time spent in voice, non voice, friction and
       nasalance (with optional Nasality Processor) (%)
  • – Dynamic phonetogram – Ax vs Fx, first and second order
    – Qx vs Fx, first and second order
    – Statistics
  • P4 or Pentium-M (Centrino) processor
  • 512 MB RAM
  • 80GB IDE HDD
  • CD-RW
  • USB 2.0 interface
  • Windows XP Professional
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