People with very good pitch discrimination can very quickly determine what note they are listening to. The note on the musical scale called C 6 (two octaves above middle C) has a frequency of 1050 Hz. Some trained musicians can identify this note after hearing only 12 cycles of the wave. How much time does this correspond to?
People with very good pitch discrimination can very quickly determine what note they are listening to. The note on the musical scale called C 6 (two octaves above middle C) has a frequency of 1050 Hz. Some trained musicians can identify this note after hearing only 12 cycles of the wave. How much time does this correspond to?
People with very good pitch discrimination can very quickly determine what note they are listening to. The note on the musical scale called C6 (two octaves above middle C) has a frequency of 1050 Hz. Some trained musicians can identify this note after hearing only 12 cycles of the wave. How much time does this correspond to?
Sound waves travel at roughly 340 m/s at room temperature. The minimum hearing range of a human is 20Hz. a) What is the wavelength of this wave? b) Could this wavelength fit inside the dimensions of Room 411( room dimensions are roughly 11.5 m x 8.7 m)? Justify your answer with sound reasoning
Although 0 dB is often referred to as the lower threshold of human
hearing, it is important to realize that the human ear is not equally
sensitive to all frequencies of sound. In other words, a particular noise
may sound louder or softer depending on the frequency of the sound
wave being transmitted. Because of this variation, scientists have
defined a unit of loudness, called a phon, to represent the intensity of
sound waves with a frequency of 1000 Hz: A 60-phon sound is one
that is perceived by the human ear to have the same loudness as a
sound wave with an intensity of 60 dB and a frequency of 1000 Hz.
Figure
Intensity (in dB)
100
80
60
40
20
0
30
50
100
500
100 phons
80 phons
60 phons
40 phons
20 phons
0 phons
000'I
Frequency (in Hz)
000'S
10,000
1 of 1
There is no simple mathematical formula for converting phons into decibels. The relationship between these two measures of intensity has been determined by
experiment. The graph (Figure 1) displays the perceived loudness of sound…
A.) I start with a bar 1.82 meters long. How long must I make a second bar to be a perfect fifth above the first?
B.) A vibrating bar has a fundamental frequency of 423 Hz. Find the frequency of the 3rd overtone and bring it down by octaves until you are in the octave starting with the fundamental. What frequency is this? Note, 2.76f is the first overtone.
Chapter 15 Solutions
College Physics: A Strategic Approach Technology Update, Books a la Carte Edition; Modified Mastering Physics with Pearson eText -- ValuePack Access ... Physics: A Strategic Approach (3rd Edition)
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