What voice signal, transmitted three times, signifies distress?

The internationally recognized voice distress signal is 'MAYDAY', derived from the French phrase 'm'aidez', which means 'help me'. It is transmitted three times in succession to clearly indicate a life-threatening emergency and to ensure the message is not mistaken for normal background traffic. While 'SOS' is widely known, it is exclusively reserved for Morse code transmissions, not voice. Other everyday words like 'HELP' or 'EMERGENCY' are not the official international standards for declaring a critical distress situation over two-way voice radio.