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Test and Verification
Each tbone aviationTM headset is tested and verified against the approved specifications in accordance with the ETSO and TSO approval obtained by tbone aviation.
Once the headset has been produced the test is conducted by trained personal using special designed and designated semi automated test equipment. A report is generated for each test and each test report is kept at the tbone aviation domicile.
The test verifies each on the three main parts of the headset:
- Intercom cable
- Amplifier
- Earpiece
To verify the input and output of the headset, the following two areas are tested:
Loudspeakers
The test equipment generates a signal as if the headset was connected to an aircraft and measures the output on each earpiece with a calibrated reference microphone. The image below shows a tbone aviation headset place on the reference microphone.
The image below shows a graph with a tbone aviation headset loudspeakers response generated from the test equipment.
Microphones
Since the tbone aviationTM headset uses the bone conducting technology, it is not possible to test the microphone by “normal” means (using a loudspeaker). In order to emulate this, the earpiece, which is
to be tested, is placed on a small calibrated vibrator which is controlled by the test equipment to generate specific frequencies. The test equipment then measures the output of the microphone at these frequencies to verify that the microphone is working within the specifications.
The image below shows how a tbone aviationTM headset is placed in the test equipment on the vibrator.
The image below shows a graph with a tbone aviationTM headset microphones response generated from the test equipment.
