Hindi dictograph का अर्थ हिंदी में

• ध्वनिग्राहक

English dictograph meaning in English  •  dictograph का अर्थ अंग्रेजी में

Noun

• A telephonic instrument for office or other similar use, having a sound-magnifying device enabling the ordinary mouthpiece to be dispensed with. Much use has been made of it for overhearing, or for recording, conversations for the purpose of obtaining evi