A-weighted decibel (dBA or dB (A)) is an expression of the relative loudness of sounds as perceived by the human ear. A-weighting gives more value to frequencies in the middle of human hearing and less value to frequencies at the edges as …

A-weighted decibels, or “dBA,” are often used when describing sound level recommendations for healthy listening. While the dB scale is based only on sound intensity, the dBA scale is based on intensity and on how the human ear responds. Because of this, dBA gives us a better idea of when sound can damage your hearing.

2023年12月29日 · DBA stands for A-weighted decibels and is a unit used to measure the relative loudness of sounds as perceived by the human ear. A-weighting gives more value to frequencies in the middle of human hearing and less value to frequencies at the edges as compared to a flat audio decibel measurement.

「A加權聲音壓力位準」(A-weighted Sound Pressure Level)，單位為 dB (A)：是將每個不同頻率的聲音dB值，取A加權的「頻率加權函數」，再將經A加權後之各頻率的聲音dB值，累加起來的總dB分貝值，就是dB (A)。

2024年8月22日 · Now in some cases, you will notice that noise levels are given in dBA (A-weighted decibels). dBA is decibels adjusted to reflect the ear’s response to different frequencies of sound.

With the dB (A) filter the sound level meter is less sensitive to very high and very low frequencies. Measurements made with this scale are expressed as dB (A). Note! The abbreviation dBA or db (A) is not recognized by SI. According to SI - use. "the A weighted sound pressure level is x dB" or. "LA is x dB" where.

2015年4月6日 · dB (A) levels correlate well with hearing loss in industrial environments. dB (A) levels correlate well with annoyance of certain types of transportation noise sources. dB (A) level differences give an indication of relative loudness for two sounds of similar spectral content, unless there is significant energy below 500 Hz. What it’s not ...

2019年5月14日 · What is a dBA? A dBA is a weighted scale for judging loudness that corresponds to the hearing threshold of the human ear. Although dB is commonly used when referring to measuring sound, humans do not hear all frequencies equally.

The decibel (dB) is a logarithmic unit used to measure sound level. It is also widely used in electronics, signals and communication. The dB is a logarithmic way of describing a ratio. The ratio may be power, sound pressure, voltage or intensity or several other things. Later on we relate dB to the phon and to the sone, which measures loudness.

2011年10月18日 · A dB (A) spectral-sum sound pressure level is a reasonable single-number representation of the perceived overall loudness of a complex sound that contains multiple different frequencies.