U+33C8 Square Db
U+33C8 was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is a square composition of the glyphs
The Wikipedia has the following information about this codepoint:
The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a power or rootpower quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 10^{1/10} (approximately 1.26) or rootpower ratio of 10^{1⁄20} (approximately 1.12).
The unit expresses a relative change or an absolute value. In the latter case, the numeric value expresses the ratio of a value to a fixed reference value; when used in this way, the unit symbol is often suffixed with letter codes that indicate the reference value. For example, for the reference value of 1 volt, a common suffix is "V" (e.g., "20 dBV").
Two principal types of scaling of the decibel are in common use. When expressing a power ratio, it is defined as ten times the logarithm in base 10. That is, a change in power by a factor of 10 corresponds to a 10 dB change in level. When expressing rootpower quantities, a change in amplitude by a factor of 10 corresponds to a 20 dB change in level. The decibel scales differ by a factor of two, so that the related power and rootpower levels change by the same value in linear systems, where power is proportional to the square of amplitude.
The definition of the decibel originated in the measurement of transmission loss and power in telephony of the early 20th century in the Bell System in the United States. The bel was named in honor of Alexander Graham Bell, but the bel is seldom used. Instead, the decibel is used for a wide variety of measurements in science and engineering, most prominently for sound power in acoustics, in electronics and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signaltonoise ratios are often expressed in decibels.
Representations
System  Representation 

Nº  13256 
UTF8  E3 8F 88 
UTF16  33 C8 
UTF32  00 00 33 C8 
URLQuoted  %E3%8F%88 
HTML hex reference  ㏈ 
Wrong windows1252 Mojibake  ãˆ 
Encoding: EUCKR (hex bytes)  A7 BC 
Adobe Glyph List  dbsquare 
Elsewhere
Complete Record
Property  Value 

1.1 (1993)  
SQUARE DB  
SQUARED DB  
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