1. This petition is filed against the order passed by the learned Principal Special Judge for CBI cases in Crl.M.P.No.5647/2011 dated 12.09.2011, arising out of the petition filed by the Investigating Officer to direct the accused person to give his specimen voice for comparison.

2. The revision petitioner herein is the second accused in the case registered by CBI in connection with the trap proceedings. The petitioner is alleged to have involved in offering bribe of Rs. 50,000/- to one Andasu Ravindar (A-1) Additional Commissioner of Income Tax, Chennai to do undue favour in respect of his concealed income. The interception of telephonic conversation between the accused persons have revealed the conspiracy hatched between them in respect of demand and acceptance of bribe. Hence, the prosecution to compare the voice recorded during the investigation wanted the sample voice of the petitioner to be tested scientifically. The trial court allowed the petition and permitted the investigating officer to record the sample voice of the petitioner and others. Accordingly, the voice samples were also drawn pursuant to the trial court order.

3. This Criminal Revision Case is filed, ch