The author has constructed a device which gives pointer indications of acoustic intensity over a 50‐db range at frequencies up to 10 000 c/sec.The signals from a pair of pressure‐sensitive condenser microphones, mounted back to back in a space roughly the size of a dime, are treated electronically to provide pressure and velocity signals which are then multiplied and averaged in a specially designed moving‐coil dynamometer to give precise pointer readings.The theory of operation of the apparatus is discussed and the paper concludes with a brief account of the test results of the acoustic wattmeter.