. Elements of acoustical engineering. Electro-acoustics; Sound. 330 SPEECH, MUSIC AND HEARING AVERAGE AVERAGE AVERAGE TOTAL DISTANCE TOTAL DISTANCE TOTAL DISTANCE PRESSURE PRESSURE PRESSURE -â4j675PIECE0RCHESTRAI5FT.,â 15 PIECE ORCHESTRA lOFT. PIANO lOFT. ^ 0 1 0 -30 L -[ n 1 r "L â u r "* T. â r ^1 âJ J â J â¢- _ _ _ _ _ _ _ _[ _ _ _ _ _ -_ PIPE ORGAN I2FT. BASS DRUM 3 FT. ,â SNARE DRUM 4 FT. â "1 r 1, 0 -30 ' I J â L, 2 ° H -^-L^ - _ _ UA =_ ^Eb:z; BASS .^ BASS VIOL 5 FT. ,. TRIANGLE 3 FT. r ^u â "^ -^rt r'"!"
. Elements of acoustical engineering. Electro-acoustics; Sound. 330 SPEECH, MUSIC AND HEARING AVERAGE AVERAGE AVERAGE TOTAL DISTANCE TOTAL DISTANCE TOTAL DISTANCE PRESSURE PRESSURE PRESSURE -â4j675PIECE0RCHESTRAI5FT.,â 15 PIECE ORCHESTRA lOFT. PIANO lOFT. ^ 0 1 0 -30 L -[ n 1 r "L â u r "* T. â r ^1 âJ J â J â¢- _ _ _ _ _ _ _ _[ _ _ _ _ _ -_ PIPE ORGAN I2FT. BASS DRUM 3 FT. ,â SNARE DRUM 4 FT. â "1 r 1, 0 -30 ' I J â L, 2 ° H -^-L^ - _ _ UA =_ ^Eb:z; BASS .^ BASS VIOL 5 FT. ,. TRIANGLE 3 FT. r ^u â "^ -^rt r'"!" r. < 0 ^ 'â -r- ' o" ^k 0 ^^^â ' l_ 0 o -rl ° ^ â¢" -^ :s" L 0-30'â1âLIâ' :: ±:- -30 . 1, .30 ."^lC . tc ,. TRUMPET 3 FT. .. CLARINET ., CYMBALS 3 FT. ^ O 0 J -L. -L U <.,â :x. PICCOLO ,â TROMBONE 3FT. ,â FRENCH HORN 3FT. tl. o rT :: ri__c-- O 0 ^j-=^ ^ l-T. (T -1 "" -3olâ1âUâ _ -Boiâ1âUâ1â1âUâ\â1âlI_ =;F- FLUTE ,â MALE SPEECH 2IN. .â FEMALE SPEECH 2IN. t:r' a. 20 100 1000 10000 20 100 1000 10000 20 100 1000 10000 FREQUENCY IN CYCLES PER SECOND Fig. Ratio of the peak pressure to the average total pressure of the entire spectrum for speech, various musical instruments, and orchestras. The distance and average total pressure are shown above each graph. (After Sivian, Dunn and White.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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