ankitunluckyalone
New member
(1) What are the lowest and the highest frequencies that an ear can detect when the intensity level is 30dB.
(2). A pipe in air at 20 C is to be designed to produce two successive harmonics at 240 Hz and 280Hz. How long the pipe must be, and is it open or closed
(3) How many overtones are present within the audible range for a 2.44m long organ pipe at 20 C if it is (i) open (ii) closed
(4)Ultrasound waves are used to measure blood flow speeds. Suppose that a device emits a sound at 500kHz , and the speed of sound in the human tissue is taken to be 1540m/s. What is the expected beat frequency if the blood is flowing normally in large artery at2 cm/s directly away from the sound source?
(2). A pipe in air at 20 C is to be designed to produce two successive harmonics at 240 Hz and 280Hz. How long the pipe must be, and is it open or closed
(3) How many overtones are present within the audible range for a 2.44m long organ pipe at 20 C if it is (i) open (ii) closed
(4)Ultrasound waves are used to measure blood flow speeds. Suppose that a device emits a sound at 500kHz , and the speed of sound in the human tissue is taken to be 1540m/s. What is the expected beat frequency if the blood is flowing normally in large artery at2 cm/s directly away from the sound source?