sonic testing मीनिंग इन हिंदी

In addition, The Falcon Project Ltd completed and tested a full scale monopropellant thruster for sub-sonic testing of the vehicle.
The Bush administration has been arguing that some deep-sea sonic testing is exempt from federal laws requiring environmental review of government projects.
But Cummings, the environmental group's lawyer, said scientists at a government conference this month found a likely connection between the sonic testing and the deaths.
The ruling represents a victory for environmental groups that have accused the government of endangering underwater life through stepped-up sonic testing, including a military sonar program.
After ultra-sonic testing both engines were found to have thin spots in their fireboxes, which are a part of their boilers, thus the engines were taken out of service.