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If you like it, buy me a beer
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Horizontaal |
Decibels: audio and RF related topics 
related topics: Acoustics, Antennas, Logarithms and exponentials part of mathematics |
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Bels,
decibels en dB pdf file,
in Dutch |
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Characteristics of Sound and the Decibel Scale |
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Characteristics of Sound and the Decibel Scale |
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Common-mode
rejection ratio Common-mode rejection ratio (CMRR) is a measure of the
capability of an instrument, such as an operational amplifier, to reject a
signal that is common to both input leads |
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dBi |
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Decibel: définition et usage en Français |
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Decibel pdf file |
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Decibel
the Decibel Scale, acoustics, sound intensity |
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Decibel
calculator excel file |
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Decibel
Handout
Bel, dB, dBmV, dBm, dBµV, dBµW, dBµWatt, pdf file |
| Decibel
in communications the dB value is calculated with respect to a standard or
specified reference |
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Decibels decibels, dB,
what are Decibels, Decibels explained, pdf file |
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Decibels decibels, dB,
what are Decibels, Decibels explained |
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Decibels
what is a Decibel |
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Decibels
what is a Decibel |
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Decibels The
decibel (dB) is a measure of the ratio between two quantities, and is used in a
wide variety of measurements in acoustics, physics and electronics, ... |
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Decibels
what are the different types of decibel measurement: dB, dBA, dBC, dBV, dBm and
dBi? |
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Decibels
dBi, dBd, dBm, dBmV, Decibels related to dipole
antenna, ..., pdf file |
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Decibels decibels, dB,
dBF, decibels referred to 1 femtowatt, dBk the signal level in DECIBELS referred to 1,000 watts, dBm
decibels referred to 1 milliwatt, dBm signal
level in DECIBELS referred to 1 microwatt, dBV decibels referred to 1 volt RMS,
dBW decibels referred to 1 WATT, Signal-to-Noise ratio, dynamic range of a
sound, sound pressure, sound pressure level |
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Decibels and power The sensitivity tells you how loud a sound you'll get out
of the speaker when you put a given amount of electrical power in, Hi-Fi power
amplifiers, loudspeakers |
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Decibels and their use in radio systems understanding Decibels and their use in radio systems, dBi,
dBd, EIRP, This article discusses the basic unit of measurement used in radio
signals: the decibel or dB. It is named after Alexander Graham Bell - that is
why the “B” is capitalized, pdf file |
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Decibels in radio systems
dB (Decibel), dBm (dB milliWatt), dBd (dB dipole), dBi (dB isotropic), EIRP
(Effective Isotopic Radiated Power), FSL (Free Space Loss) |
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Decibel Scales: Sound Pressure
Level and Sound Intensity Level The most physically understandable quantity
used in determining the size of a sound signal is the Pressure Amplitude.
Pressure amplitude is a measure of the size of the variation in air pressure
caused by a sound wave, ... |
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Decibels
demystified |
| Decibel levels chart
Decibel levels chart |
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Decibel levels chart
Decibel (Loudness) Comparison Chart |
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Decibels |
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Decibels: what is the difference between dB, dBi, dBu, dBm, dBuV, and other units?
dBi = dBd + 2.15, i: isotropic antenna, d: half-wavelength dipole |
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Equal loudness tester
This site allows you to measure equal loudness curves--the frequency response of
your own ears, loudness |
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Geluid en decibel in
Dutch |
| Intensity and the decibel scale
Sound Properties and Their Perception
Intensity and the Decibel Scale |
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Le DECIBEL en ELECTRONIQUE en Français |
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Linear and Logarithmic Amplitude Scales
Linear Amplitude Scaling,
Logarithmic Amplitude Scaling, The Decibel, dB Values vs. Amplitude, Level
Ratios, Unit Conversions, VdB Levels vs. Vibration Levels in ips |
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Power Conversions Power
Conversions chart, pdf file |
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Pressure Amplitude:
Quantitative Measurement of Sound |
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RF Calculator
Radio and RF units conversion/JavaScript application,
Conversion calculator from Watt to dBm and from dBm to Watt, ...,
a tip |
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The dB in Communications
The dB in Communications systems, The db (decibel) is a relative unit of
measurement commonly used in communications for providing a reference for input
and output levels |
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The Decibel Unit of Measurement Voltage, power, [or current] gain can be
expressed as a pure ratio or as a decibel value. The original unit was the Bel,
named after Alexander Graham Bell, and was used in telephone work, ..., pdf file |
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UNDERSTANDING AND USING
THE DECIBEL The decibel, or dB, is a means of expressing the gain of an
active device (such as an amplifier) or the loss in a passive device (such as an
attenuator or length of cable), ... |
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Understanding dB
dB is an abbreviation for "decibel". One decibel is one tenth of a Bel, named
for Alexander Graham Bell, ..., dBFS - dB Full Scale, dB SPL, sound pressure
level, A-Weighting dB(A), Relationship between Frequency and Level, |
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Understanding dB
scale ppt file |
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What is a Decibel
And what are the different types of decibel measurement: dB, dBA, dBC, dBV, dBm
and dBi? How are they related to loudness? |
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What is a decibel the dB is a logarithmic unit used to describe a ratio. The
ratio may be power, sound pressure, voltage or intensity |
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Working with decibels - a tutorial |
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Horizontaal |
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Unit |
General electronics |
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CMRR (dB) |
CMRR = 20 log Ad/As |
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dBu or dBv |
voltage referenced to 0.775 volt, RMS value, not related to any impedance, u
stands for unterminated, audio equipment: input level is +4 dBu, which
corresponds to 1.23 volts RMS value |
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dBm or dBmW |
power measurement relative to 1 milliwatt,
dBm = 10 log P/PO;
when impedances are equal |
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dBm(75) |
power measurement relative to 1 milliwatt, measured with respect to a 75Ω load,
RF systems, cable television |
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dBm(600) |
power measurement relative to 1 milliwatt, measured with respect to a 600Ω load,
telephony line impedance, 0 dBm corresponds to 0.775 volt, RMS value |
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dBm(50) |
power measurement relative to 1 milliwatt, measured with respect to a 50 ohm
load |
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dBV |
RMS voltage of a signal in a wire, relative to 1 volt, not related to any
impedance |
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dBmV |
relative to 1 mV across a given impedance, RMS voltage |
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dBW |
power amplification relative to 1 watt, 50Ω load, RF power amplifiers |
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Acoustics |
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dB(SPL) |
sound pressure level, relative to 20 micropascals (PO) or 20 mN/m2, 1kHz, the quietest sound
a human can hear,
dB(SPL) = 20 log P/PO |
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IdB |
sound intensity relative to a standard threshold of hearing intensity Io:
Io = 10-12 watts/m2; IdB =
10 log I/IO |
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RF Communications |
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dBc |
power of one signal referenced to a carrier signal |
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dBd |
gain of an antenna compared to a dipole antenna |
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dBf |
referred to 1 femtowatt, signal levels at the RF inputs of FM tuners |
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dBk (dB) |
referred to 1000 watts, used in radio and television transmitting stations |
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dBi |
gain of an antenna compared to an isotropic antenna, mostly used for antennas
above 1 GHz, dBi = dBd + 2.15 |
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dBu (dBµV/m) |
electric field intensity: microvolt/meter |
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dBmV |
RF level relative to 1 mV |
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Last updated on:
2011-01-02
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