Search found 62 matches

by bjkwon
July 27th, 2020, 10:35 pm
Forum: Developer Notes
Topic: How many samples are there in x(t1~t2)?
Replies: 0
Views: 69

How many samples are there in x(t1~t2)?

Given fs, every sample point is in the grid of 1/fs second. Then, exactly how many sample points are there in the expression x(t1~t2), which is the audio signal x between t1 ms and t2 ms? If t1 is exactly on the time grid, the first index is the one corresponding to t1. If t2 is exactly on the time ...
by bjkwon
June 15th, 2020, 12:03 am
Forum: Sound beyond sound
Topic: 100. The best thing you can do to a dying person--say something nice
Replies: 0
Views: 224

100. The best thing you can do to a dying person--say something nice

Senses of tactile, taste, and smell might have already gone when the heart is about to stop beating and the body starts to shut down. Finally, he closes his eyes--the vision is out. What's left? He can probably still hear, even if he seems unconscious. Play his favorite piece of music softly. Whisp...
by bjkwon
June 15th, 2020, 12:01 am
Forum: Sound beyond sound
Topic: 99. Audiographic memory
Replies: 0
Views: 101

99. Audiographic memory

You might have forgotten his name or what he looked like; but upon recognizing his voice, you know he was your classmate decades ago. A seemingly simple sound connects you to endless chains of memories. A train horn evokes your memories far more than just a train. Your childhood favorite tune bring...
by bjkwon
June 15th, 2020, 12:00 am
Forum: Sound beyond sound
Topic: 98. Infrasound
Replies: 0
Views: 105

98. Infrasound

Humans cannot hear low-frequency sounds below 20 Hz. It doesn't mean that those sounds can be dismissed. Several reports suggest that infrasound may cause the feelings of annoyances, fear, or awe {refs}. While the claims of infrasound associated with ghost sightings may be considered a hoax, the im...
by bjkwon
June 14th, 2020, 7:45 pm
Forum: Sound beyond sound
Topic: 95. Silence is a mirage
Replies: 0
Views: 129

95. Silence is a mirage

Can we experience complete silence? Probably not. The quieter it is, the harder to get rid of all sounds. In a soundproof room, you start to hear sounds of your own body: breathing, swallowing, or digestion. Even if you manage to block your ears completely, the auditory neurons still make spontaneo...
by bjkwon
June 14th, 2020, 7:43 pm
Forum: Sound beyond sound
Topic: 93. Can you really hear wind?
Replies: 0
Views: 136

93. Can you really hear wind?

Howling, whistling, rattling... there are many words to describe the sound of wind. But wait, does the wind have a sound? Those sounds simply came from the interactions between the wind and objects. "Howling wind," for example, describes the nature of the howling structure (perhaps the gutter of yo...
by bjkwon
June 14th, 2020, 7:42 pm
Forum: Sound beyond sound
Topic: 92. Auditory inception
Replies: 0
Views: 103

92. Auditory inception

During REM [Rapid Eye Movement] sleep, the brain monitors external sounds and incorporates them into our dream. In an episode of Friends "The One with Hypnosis Tape," voices heard while asleep affects Chandler's behaviors. In real life, the content of verbal stimuli during REM sleep is not always t...
by bjkwon
June 14th, 2020, 7:41 pm
Forum: Sound beyond sound
Topic: 90. Overcoming noise
Replies: 0
Views: 118

90. Overcoming noise

More often than not, we hear a sound in the background of other sounds. We ought to focus on the target sound and figure out the meaning of others. How much noise can we tolerate to get the meaning of sound? It varies a great deal and can be anywhere from 0 dB SNR to -20 dB SNR [Signal-to-Noise Rat...
by bjkwon
June 14th, 2020, 7:40 pm
Forum: Sound beyond sound
Topic: 89. What is sound, anyway?
Replies: 0
Views: 101

89. What is sound, anyway?

Sound is a physical phenomenon involving vibration of air molecules and the transfer of energy. The existence of sound can be understood and demonstrated with tools of physics, as opposed to our mind and soul that we cannot demonstrate with physics. However, the vibration does not turn into sound u...
by bjkwon
June 14th, 2020, 7:39 pm
Forum: Speech communication--voicing yourself and hearing others
Topic: 88. Voice of transgender people
Replies: 0
Views: 151

88. Voice of transgender people

Female-to-male transgender people produce a male voice easily as they develop masculine features in their larynx through hormonal therapies. But male-to-female transgender people typically face a greater challenge in feminizing their voices because female hormone injections will not shrink their al...