It's an ULTRASONIC microphone so we can hear the baby's heartbeat.
Meaning and definitions of ultrasonic, translation in Frisian language for ultrasonic with similar and opposite words. Also find spoken pronunciation of ultrasonic in Frisian and in English language.
What ultrasonic means in Frisian, ultrasonic meaning in Frisian, ultrasonic definition, examples and pronunciation of ultrasonic in Frisian language.