Frequency transducers convert energy into sound and vice versa. They are used in sonar equipment, acoustic speakers, microphones, guitar pickups, ultrasound imaging, and fishing depth sounders. They work by converting electromagnetic vibrations or sound waves into electrical signals that can be converted back into sound. A frequency transducer is a mechanism for converting some type […]
A frequency multiplier produces an output frequency that is a multiple of its input frequency, using non-linear signal transfer. It is used in communication circuits and FM systems. The heterostructural barrier varactor is a useful device for frequency multiplication. A frequency multiplier is a device that produces an output with a frequency that is an […]
Frequency theory explains how the brain experiences sound waves, with pitch encoded by the firing rate in the primary auditory fiber. The theory explores how sound is experienced by the mind and accounts for hearing through the anatomical structure of the ear. Frequency theory attempts to explain how the brain experiences sound waves. While frequency […]
Cutoff frequency is the point at which a device stops functioning efficiently due to a reduction in energy flow. It can occur in various frequency ranges, resulting in weak transmissions. Standards for transmissions are developed to establish a cutoff frequency range for safe operation. Sometimes known as a cutoff frequency or corner frequency, a cutoff […]
The CPU is the “brain” of a computer and its clock speed determines its performance. Frequency scaling increases performance, but has limits due to heat production. Multi-core processors double effective speed, but require software optimization. The “brain” of a computer is its central processing unit (CPU). In normal operation, the CPU processes all operations for […]
A frequency table organizes data into classes and counts how many times each class occurs. It can be used to find basic statistics, determine distribution, and show central tendency and variability. Larger datasets may require class ranges and a calculator. A frequency table is an organized count of items or values. In its simplest form, […]
The frequency spectrum tracks and classifies electromagnetic waves emitted by anything that emits energy at a particular frequency, including light, sound, radio, and X-rays. Frequencies are measured in hertz and are important for understanding how waves interact with matter, determining safety levels, and identifying interference in broadcasting. The electromagnetic spectrum ranges from radio waves to […]
High-frequency ventilation uses a high frequency and low tidal volume to reduce the risk of lung damage in patients who cannot breathe on their own. It may be recommended if a patient is unwell on a conventional ventilator or at risk of lung damage. However, there are some risks associated with this type of mechanical […]
Histograms count data in compartments, with frequency distribution histograms being the most common. They involve collecting and sorting data into compartments, then graphing using a bar chart. Other forms include line graphs and relative frequency graphs. They have various uses in economics, such as tracking household income or profits in banking and accounting. Mode, symmetry, […]
A frequency distribution curve is a graph showing the frequency of occurrence of a variable. The ideal bell curve is symmetrical and has the mean, median, and mode equal. Standard deviation provides a measure of the “spread” of population data. The curve allows for understanding of both the sample population and the position of an […]
A frequency counter measures the frequencies of light and sound waves, detecting and displaying frequencies above and below human sensing capability. It receives input signals from various interfaces and can send alerts when frequencies are exceeded. The time base is usually a quartz crystal oscillator or GPS receiver. Frequency counters are used in electronic industries, […]
Alleles are different forms of genes that can vary in sequence between individuals. The allele frequency of a gene is the proportion of a population that has a particular type of gene. Different people can have a gene in the same location that does different things. The sickle cell gene has two important alleles, one […]
Digital TV channels are broadcast on a specific position in the radio spectrum, using multiplexes to compress several channels into one frequency. Old TVs and antennas cannot understand this new language, requiring a digital decoder. Satellite TV works similarly, using a dish to pick up the signal. Digital TV frequency is the specific position in […]
Frequency lists are used in linguistic analysis to study language structure and usage. They can be word or letter lists, with letter frequencies used in cryptography. Frequency analysis was used by Sherlock Holmes to decipher a code in The Adventure of the Dancing Men. Word frequency lists are also used in ancient language studies. Zipf’s […]
A frequency response curve is used by stereo component manufacturers to determine the quality of sound reproduction. It shows the amplitude over frequency, with the vertical axis representing sound level in decibels and the horizontal axis representing frequency in hertz. Bandwidth is the highest to lowest frequency signal output demonstrated by a component, and the […]
