Tiêu chuẩn iso 00389 2 1994 scan

IS0 c olab or ates c lo ely with the Inter natio al Elec tr otec hnic al Commis io IEC o al ma tter s of elec tr otec hnic al standa r diza tio... Intr oduc tion Ea ch p ar t of inter n

STANDARD 389-2

F irst e itio

19 4-0 -l 5

A co s tiq e

au iombriq es -

Pa rtie 2: Niv ea ux de rkfkren e Eq iv a lents de pres io ac u tiq e

lmina ire po r les & outeurs ~4 s n purs et B in ertio

Refere ce numb r

IS0 3 8 :19 4(E)

F or ewor d

IS0 (he Inter natio al O r ganiza tio for S ta ndar diza tio ) is a worldwide

feder atio of na tio al sta nda rd bo ies (IS 0 memb r bo ies) T he work

of pr eparin Inter natio al Sta nda rd is n rma lly c ar r ied o t thr ou h IS0

tec hnic al c ommite s Eac memb r bo y inter ested in a s bjec t for

whic h a tec hnic al c mmite ha s b en establ s ed ha s the r i ht to b

r epr esented o that c ommite Inter natio al or ganiza tio s, g v ernmenta l

a nd n n-g v ernmenta l, in lais n with ISO , als take p ar t in the wor k IS0

c olab or ates c lo ely with the Inter natio al Elec tr otec hnic al Commis io

(IEC ) o al ma tter s of elec tr otec hnic al standa r diza tio

Dr aft Inter natio al Sta nda rd a dopted by the tec hnic al c ommite s a r e

c ir c ulated to the memb r bo ies for votin Publc a tio a s an Inter natio al

Sta nda rd r eq ir es a ppr ov a l by at least 7 % of the memb r bo ies c astin

a vote

Inter natio al Sta nda rd IS0 389-2 was pre a red by Tec hnic a l Commite

lSO /T C 43, Ac ou tic s

IS0 389 c on ists of the folowin p ar ts, u der the genera l title Ac ou tic s

- Referen e zer o for the c alib r atio of a udiometr i eq ipment:

- Par t I Referenc e eq ivalent thr es old s u d pres ure levels for

pure to es a nd s pr a -aur a l ea rph nes

- Part 2: Referenc e eq ivalent thr es old s u d pres ure levels for

pure to es a nd in er t ea rph nes

- Pa r t 3: Referenc e eq iva lent thr es old for c e levels for pure to es

a nd bo e vib r ator s

- Pa r t 4: Referenc e levels for na rrow-ba nd ma skin n ise

- Pa rr 5: Referenc e eq ivalent thr es old s u d pres ure levels for

pure to es in the freq enc y ra nge 8 kHz to 7 kHz

- Part 6: Referenc e eq iva lent thr es old s u d pres ure levels for

ac ou tic test sig als of s or t d r atio

- Par t 7: Referenc e thres old of hea rin u der fr ee-ield a nd difu e-

field lstenin c on itio s

0 IS0 199 4

Al rights reserv ed Unles oth rwise sp c ifie , n pa rt of this pub lic a tio may b re ro u e

or uti ze in a y form or by a ny mea ns, electro ic or mecha nica l, inc luding p otoco ying a d

mic rofim, with ut p rmis io in wr iting from th p ublsh r

Interna tio a l O rga niza tio for Sta nda rdiza tio

Case Posta le 5 l CH-121 Ge e e 2 l Switzerla nd

Printe in Switzerla nd

i

Pa r t 1 wi b a r e-is ue of IS0 389:19 1.

An exes A an B of this p ar t of IS0 389 a re for infor ma tio o ly

Intr oduc tion

Ea ch p ar t of inter natio al Sta nda rd IS0 389 sp ec ifies a sp ec ific refer enc e

zero for the c alib r atio of a udiometr i eq ipment IS0 389:19 1 (o b

r e-is ued a s IS0 389-l) c onta in v a lues of referenc e eq iv alent thr es old

s u d pres ure levels (RET SPL) for pure to es a nd two sp ec ified p a tter ns

of s p ra-a ural ea rph nes u ed in c onju c tio with a n a c ou tic c oup ler

c onfor min to IEC 3 3, a nd for other s pr a-aur al ea rph nes of sp ec ified

p a tter ns in c onju c tio with a n artific ial ea r c onformin to IEC 318

IS0 389-4 sp ec ifies r efer enc e levels for na rrow-ba nd ma skin n ise b sed

In s me a udiolo ic al ap p lic a tio s it ma y, h wev er, b desir able to u e in-

ser t ea rph nes to delver either the test sig al or the ma skin n ise, e.g

to red ce the oc c lu io efec t or inter aur al efec ts RET SPL da ta for these

kin s of ea rph ne a r e sp ec ified in this p ar t of IS0 389 It is ba sed o a n

a sses ment of tec hnic al da ta prov ided by lab or ato es in difer ent c u -

tr ies re r esentin the mo t r elab le da ta availa b le at the time

It is rec og ized that small difer enc es may oc c ur b twe n r es lts of

hea r in thr es old level me s rements obta ined by audiometric eq ipment

u in difer ent patter ns of ea rph ne, i.e s pr a -aur a l or in er t ea rph nes

iv

Acoustics -

This p ar t of IS0 389 sp ec ifies r efer enc e eq iv alent

thr es old s u d pres ur e levels (RET SPL) for the

c alib r atio of pure- o e a udiometers s p lementa ry

to th se sp ec ified in IS0 389:19 1 l) Va lues giv en in

this p ar t of IS0 389 a r e ap plc able to in er t ea rph nes

of a p a tter n sp c ified in c la use 4

F or infor matio , a n te o the der ivatio of the

r efer enc e v alues an the o gin of the da ta inp ut is giv en in

a nnex A, a nd a b i iogra p hy is giv en in a nnex B

T he folowin sta nda r ds c ontain pr ovisio s whic h,

thr ou h referenc e in this tex t, c on titute p r ovisio s

of this p ar t of IS0 389 At the time of p ub lic atio , the

editio s in ic ated were valid Al sta nda rd a r e s b jec t

to r evisio , an p ar ties to a gre ments ba sed o this

p ar t of IS0 389 a r e en o ra ged to investigate the

p os ib ilty of a pp ly in the mo t r ec ent editio s of the

sta nda rd in ic a ted b low Memb rs of IEC a nd IS0

ma inta in r egister s of c ur r ently valid Inter natio al

Sta nda rd

IS0 389:19 1, Ac ou tic s - Sta nda rd referenc e zer o

for the c alib r atio of p ure- o e air c on uc tio

audi0meter s.l

;EC 126:1973, /EC r efer enc e c oupler for the

led to the ea r by me n of ea r in er ts

IEC 71 :1981, O c c lu ed-ea r simulator for the

me s rement of ea rph nes c upled to the ea r by ea r

in er ts

3 Definitio s

F or the purpo es of this p ar t of IS0 389, the defi-

nitio s given in IS0 389:19 1 to ether with the fol-

lowin definitio s app ly

3.1 ea r in er t: Dev ic e u ed to pr ov ide the ac ou tic

c oup lin b twe n a n ea rph ne an the ea r c anal

NOT 2 This may b , for exa mple, a n ea rmould or a

simiar d v ice with or with ut a co n cting tub

3.2 in er t ea rph ne: Sma ll ea rph ne c upled to the

ea r c a na l by me n of a n ea r in er t, or a ttac hed to a

c on ec tin element whic is in er ted into the ea r c a-

nal T he ea r in er t may b a p ar t of the in er t

ea rph ne

3.3 ea r simulator : Dev ice for mea surin the o tp ut

loa din c on itio s in a sp ec ified freq enc y range It

c on ists es entially of a p r inc ip al c avity , a c ou tic loa d

networ ks an a c alib r ated mic roph ne T he loc atio

ma tely to the s u d pr es ur e ex istin at the h man

ea rdr um

1) To b reis ue a s IS0 3 8-l

1

3.4 oc c lu ed-ea r simulator : Ea r simula tor whic

simula tes the in er p ar t of the ea r c a nal, from the tip

of an ea r in er t to the ea rdrum

NOT 3 A n oc c lu ed-ea r simula tor is sp ec ified in

IEC 71

3.5 ear -in er t simulator (ea rmo ld s b stitute,

ea rmo ld simulator ): In er t whic h ter mina tes the en-

tr a nc e of the ea r simula tor an pr ov ides for pa ssa ge

of s u d into the ac ou tic c oupler or the oc c lu ed-ea r

simula tor thro g a n op nin o its ax is

3.6 ac ou tic c oupler for in er t ea rph nes: C a vity

of sp ec ified s a pe a nd v olume whic h is u ed for the

c alib r atio of an in er t ea rph ne in c onju c tio with

a c alib r ated microph ne to mea sure the s u d pr es -

ure within the c avity

NOT 4 A n a c ou tic c oup ler for in er t ea rph nes is

sp ec ified in IEC 126

This p ar t of IS0 389 app lies to in er t ea rph nes of

ty pe Ety motic Resea rc h ER3A, c upled to the h man

ea r by ea r in er ts of ty pe ER-3-14

NOT 5 In er t ea rph nes of ty pe EA RTONE 3A a re in al

r elevant a sp c ts identic alto ER-3A in er t ea rph nes Ea r

in er ts of ty p e ER-3-14 a r e als ofer ed a s EARLINK 3A ea r

in er ts

T he ea r in er t c on ists of a foam ear tip with a n mina l

dia meter of 13 mm an a n mina l len th of 12 mm

It c ontain a n inter nal p lastic tub with a n mina l

inter nal dia meter of 1,9 mm a nd a n mina l efec tive

the foa m ear tip a nd the en of a s u d tub nip p le

(n mina l inter nal dia meter 1,9 mm, n mina l len th

1 mm) T he nipp le c n ec ts the ea r in er t to the in-

ser t ea rph ne o tput via a s u d tub with a n mina l

inter nal dia meter of 2 mm an a n mina l efec tive

the nipp le a nd the en of the ea rph ne o tput (se

fig r e 1)

T he ea r in er t s all b in er ted into the ea r c ana l s

that the o ter en of the ear tip is 2 mm to 3 mm in-

side the entra nc e of the ea r c anal

5 Sp cific a tio s

T he r efer enc e eq iva lent thr es old s u d pres ure

levels (RET SPL ) for ea rph nes a s sp ec ified in

c la use 4 , in an ac ou tic c oup ler c onfor min to

IEC 126 an in a n oc c lu ed-ea r simula tor c onfor min

to IEC 71 , a r e giv en in tab le 1

T hese v a lues a p ply when the s u d tub nip ple of the

in er t ea rph ne is fix ed flu h to the a c ou tic c oupler

a nd to the oc c lu ed-ea r simula tor in a cc orda nc e with

fig r e 2 of IEC 126:1973 or IEC 71 :1981, r esp ec t-

ively , by me n of p lastic tub in T he total efec tive

len th of the c on ec tin elements b twe n the in er t

ea rph ne o tput a nd the ea r in er t simulator is then

NOT 6 In the ca se of a udiometers fite d with in er t

ea rph nes other tha n that desc rib d in c la use 4 , the p r o-

c ed re given in A.2.2 of IS0 369:19 1s o ld b u ed to

determine c r respo din RET SPL v alues

Dime sio s in mi mete

So n tub e

ER-3A iner t e arp ho ne

0 1.9

-

So n tube nip p le

Foam eartip

ER -3-16 ear in er t

F ig re 1 -

A n ER-3-14 ea r in er t a nd its c oupln to an ER3A in er t ea rph ne

3

Dime sio s in mi mete

F ig r e 2 - Co pln of the in er t ea rph ne to the ac ou tic c oup ler or to the oc c lu ed-ea r simulator

ER-3A in er t earp ho e

,

So n tub e

a) Ac u tic c oup ler

Oc c lu e -ear slmulator -

b) Oc c lu e -ear simulator

T a ble 1

- Referenc e eq iv alent thr es old s u d

pres ure levels in a n ac ou tic c oupler c nformin

to IEC 126 a nd in a n oc c lu ed-ea r simulator

F rrque c

Hz

2 0 )

18,0

4 0 )

3

5 0

5,5

6 0

4,o

7 0

2 0

8 0 1

18

10 0

a 0

1 2 0

zo

1 5 0

2.0

16 0 ’

2 0

2 0 0

3.0

3 0

3,5

3 15 2)

4.0

4 0 0

5

5 0

5,O

6 0 0

2.0

6 3 0

zo

8 0 0

a 0

1) Va lues a re roun e to n a rest ha lfd c ib l

RET SPL (ref 2 pPa 1 l)

dB

Acou tic coup ler

(IEC 12 1

O cclud d-ea r

simula tor

(IEC 71 I)

2 ,0

2 ,5

21.5

17,5

15,5

13.0

9.5

7# 5

6

5,5

5

8

9.5

9.5

1 ,5

13.5

13.0

13.0

15,0

18,5

16,0

16,0

15,5

2) V a lues for th se fre ue cies a re d riv ed by inter p ola tio

1

Annex A

T he RET SPL v a lues sp ec ified in this p ar t of IS0 389 were obta ined from the r es lts of thr ee in e en ent ex per -

imenta l investigatio s c mmu ica ted to lSO /T C 43, Ac ou tic s B r ief p ar tic ular s of the tests a re given in tab leA.l

More details o me s rement meth d an test s bjec ts a re giv en in the r eferenc es q oted in an ex B

T he in er t ea rph ne thr es old da ta u ed in the dev elopment of this p ar t of IS0 389 were n t c or r ec ted for devi-

atio s of the test s b jec t’s hea r in thr es old levels from 0 dB, a s mea sured with the r efer enc e ea rph ne

T he RET SPL da ta were deriv ed by a v era gin the da ta of the thr ee investigatio s with ut weig tin for difer ent

n mb rs of s b jec ts

T a ble A.1

- Investigatio s of RET SPL va lues

T est da ta

T yp of test ea rph ne

T yp of r efer enc e ea rph ne

Investigatio s

R ef [3]

ERSA in er t ea rph ne c onformin to c la use 4

Hea rin thr es old tec hniq e

R eferenc e ea rph ne u ed to ver ify n rma l hea rin of test s b jec ts

DT 4

Fr eq enc ies tested,in her tz 250, 50 , 1 0 0, 2 0 0,

125,250, 50 , 10 0, 2 0 0, 125,250, 315,50 ,63 ,

2 0 0,2 50 ,3 0 0,4 0 0,

5 0 0,6 0 0,6 3 0,8 0 0

Hea rin thr es old levels of

test s b jec ts

T yp of c oupler u ed for

in er t ea rph ne

~10 dB at a ny test fr eq enc y b low 4 0 0 Hz an

~15 dB at test freq enc ies of 4 0 0 Hz a nd a bov e

IEC 126:1973,fig r e 2 IEC 126:1973, fig r e 2 IEC 126:1973, fig r e 2

IEC 71 :1981, fig r e 2 IEC 71 :1981, fig r e 2

Annex B

B ib liogr ap hy

L.A KRUGER,B an KIL L IO N,M.C R ef

[4 ] IS0 3894:-3’, Ac ou tic s - R eferenc e zero for

the c alib r atio of audiometr i eq ipment -

eq iva lent thr es old s u d pres ure levels for

in er t ea rph nes Sta nd Au io , 18, 1989,

p 19 -l 9

[5] IEC 3 3:1970, /EC p r ov isio al refer enc e c oupler

audiometr y

[S ] BRINKMA NNK., a nd RICHT ER,U Referen e zer o

for the c alib r atio of pure to e a udiometers

eq ip ed with in er t ea rph nes Ac us c a, 70,

19 0, p 2 2-2 7

[6] IEC 318:1970, A n /EC a ificial ear , of th wide-

b n ty p e, for the c alib r atio of ea rph nes u ed

in a udiometr y

2) This artic le is a c omp ila tio of th res lts of five exp erime ta l studies F or th purp ses of this p a rt of IS0 3 9, h wev er,

th res lts of o e study o ly (Wib r, 19 6) could b ta ke into a ccount due to d via ting test co ditio s u e in th oth r

studies

3) To b publsh d

ICS 13.140.0

Des riptors: a cou tic , a udiometry, a udiometers, c a lib ra tio ,

a uditory thresh ld, refere ce da ta

Price b se o 7 p ges