threshold of hearing การใช้

• The threshold of hearing is generally reported as the Hz.
• The threshold of hearing at 1khz is 0 dB ( relative to . 0002 dynes / cm 2 ).
• The lowest equal-loudness contour represents the quietest audible tone the " absolute threshold of hearing ".
• The threshold of hearing is plotted relative to a standardised curve that represents'normal'hearing, in dB ( HL ).
• I'd also mention that Hungarian and English strike me as extremely similar when at the threshold of hearing, for example.
• By measuring this minimum intensity for testing tones of various frequencies, a frequency dependent absolute threshold of hearing ( ATH ) curve may be derived.
• The threshold of hearing is frequency-dependent and it has been shown that the ear's sensitivity is best at frequencies between 1 kHz and 5 kHz,
• Although the threshold of hearing is typically around 0 dB SPL, this is in fact very quiet indeed, and appliances are more likely to have noise levels of 30 to 40 dB SPL.
• Data acquisition in one-third-octave bands is required, followed by processing to yield a logarithmically-scaled value in decibels relative to a sound pressure of 20 micropascals, approximately the threshold of hearing.
• Among the results from this work is that the so-called third heart sound, " S3 ", formerly taught to be pathological, is actually produced by all hearts, but is merely below the threshold of hearing of most physicians.
• They are not the same as equal-loudness contours, which are a set of curves representing equal loudness at different levels, as well as at the threshold of hearing, in absolute terms measured in dB SPL ( sound pressure level ).
• Standard measurement practice of speaker sensitivity is driving 1 watt electrical power to the source, with the receiver 1 meter away from the source, and measuring the resulting acoustical power in dB relative to the threshold of hearing ( defined as 0 dB ).
• This is not the best threshold found for all subjects, under ideal test conditions, which is represented by around 0 phon or the threshold of hearing on the equal-loudness contours, but is standardised in an ANSI standard to a level somewhat higher at 1 kHz.
• The spectral pitches differ in perceptual salience since their sound pressure levels differ physically, they lie at different distances above the threshold of hearing, they mask each other ( and therefore lie at different distances above the masked threshold ), and may or may not lie in a region to which the ear is particularly sensitive ( a dominance region of pitch perception ).
• It is important to listen to it in the way it was composed, near the threshold of hearing . " ( liner notes ) Her collage piece " SUM ( State of the Union Message ) " is included on the " Lesbian American Composers " collection ( 1998 CRI : 780 ) . " SUM " and " DUMP " ( 1970 ), also a sonic collage, are her best known pieces.