Question

a. How many decibels is a tone with pressu th pressure P = 0.027 b. How many decibels is at wice Prerfi.e. P = 0.0004)? c. What is the pressure P of a 30 dB toner d. The threshold for pain is 150 dB. What is the ex tones (that are composed of many harmonics), corresponds to the pitch of the fundamental frequenc series). The set of harmonics can sound dB. What is the corresponding pressure P? re composed of many harmonics), the perceived pitch usually ch of the fundamental frequency (the lowest frequency in the harmonic armonics can sound like the pitch of the fundamental even when the physically present the case of the missing fundamental). For each quency should have the same perceived pitch? harmonic series, what single frequency should have the same b. 2000 + 3000 + 4000 + 5000 Hz a. 1000 + 2000 + 3000 + 4000 Hz C. 1000 + 1500 Hz d. 2000 + 2500 + 3000 Hz The speed of sound in air is 350 meters per second: slow enough that we can detect the difference in the time when a sound arrives at the two ears. Suppose the separation between the ears is 0.2 meters and a sound comes directly from the left side. a. How much sooner (in milliseconds) will the sound arrive in the left ear than the right ear? (Note: time = ear separation/speed of sound 1000 milliseconds.) b. Suppose a sound arrives at the left ear 0.5 milliseconds (ms) sooner than the right ear. If the frequency is 1000 Hz, how many cycles behind is the sound in the right ear? (Note: if there are 1000 cycles per second then there is 1 cycle per millisecond.) c. Why is this a problem for deciding whether the sound is coming from the right or left?

Answer 1

since the first question is incomplete. so, I have done the next questions.
That minimum frequency, whose perfect multiples are the harmonies u's fenown as the perceived pitch on fundamental pitch. (a) 1000 + 2000 + 3000 + 4000 Hz 1000 + 2 (1000) + 3 Clooo) + 4 (1000) Hz Here, All the harmonies are the complete multiple of 1000 in series . theme fore, fundamental frequency is 1000 Hz - (b) 2000 + 3000 + 4000 + 5000 Hz

2 (1000) + 3 (1000) + 40100o) + 5 (1000 Hz Hete, All the hadeemonics are the complete multiple of 1000 in series theme fate, fundamental frequency is 1000 Hz (C) 1000 + 1500 Hz - 500 (2) + 500 (3) Hz Heme, All the harmoni's are the complete multiple of 500 in series. there fome, fundamental frequency is 500 Hz (d) 2000, 2500, 3000 Hz 500 (4), 50(5), 500 (6) Hz the complete Here All the harmonics are multiple of 500 in series. there fort, fundamental frequency is 500 Hz

(a) Speed of sound - 350 m/s speed of between the ears = 0.2 m formula time used = ear separation x 1000 speed of sound millisec 02 myloooO 57 millisec 350 m/s (b) 1 Cycle completes in I millisec In 0.5 mili'sec, cycle complets - Ź Half cycle behind is the sound in . .. the Might eal. (o Since the differences are too small to be adequately detected. Therefore, there is a problem feve decieling whether the sound is coming from the right or left.