DATA SHEET
HMS IV.0
(Code 1500)
Digital Artificial Head Measurement
System with CompactFlash and USB
interface
Overview
With the HMS IV.0, HEAD acoustics
has developed the latest generation of
HMS artificial head measurement systems.
Features
Extension Options
· Direct recording and playback via
CompactFlash card
· Bluetooth remote control system
RC VI for controlling all functions of
the HMS IV.0
· Interfaces: USB 2.0 full speed, AES/
EBU, pulse in, RS-232, analog out
· Hand-held remote control unit RC V
· Headphone output for direct, equalized playback or monitoring
· HEAD Recorder software (via notebook / PC)
· Equalization options: linear (LIN - no
equalization), independent of direction
(ID), free field (FF), diffuse field (DF),
user-defined (USER) via download
· High-end headphones (e.g. HD IV.1
or HD IV.2) for aurally accurate
playback
· High dynamic range thanks to 24-bit
technology
· Sampling rates: 32, 44.1, 48, 88.2,
96 kHz
· Calibratable measurement system
· High input range
· Triaxial laser pointer TLP for exact
positioning of the HMS IV.0 (easy
mounting on head platform)
· Second artificial head (HMS IV.1,
HMS IV.0, HMS III.0) or a BEQ II unit
for four-channel recordings
Applications
· Extremely low noise
· Charge indicator for battery (can be
polled e.g. via RC VI)
· Investigation and optimization of
sound quality for technical products:
· Motor vehicles
· Intelligent battery management
· Vehicle components
· Automatic system check
· Household devices
· Threaded mounting platform on the
top side of the HMS IV.0 head for
attaching e.g. a laser pointer
· Compatible with artificial head
measurement systems HMS III.0 and
HMS III.L, including HMS data
02.2010 D1500e4
· Office equipment
· Power tools
· Binaural measurements:
subject to change
· Product development
· Quality control
The HMS IV.0 features a scope of
delivery containing all required components for measuring with PC or front
end.
Moreover, to meet all your requirements, the HMS IV.0 may be completed
by optional accessories, such as the
remote control RC VI or the CompactFlash card.
Thus, your measurements can be
directly stored on the CompactFlash
card, which can be easily inserted into
the slot at the front side of the artificial
head.
With the RC VI remote control system,
consisting of a Bluetooth adapter and
a PDA, all functions of the HMS IV.0
can now be controlled remotely.
Aurally accurate playback directly from
the CompactFlash card via a headphone, such as the dynamic headphones HD IV.1 or HD IV.2, is possible
thanks to the addition of an integrated
headphone output.
· Measurements in vehicles
· Measurements on test stands
· Production monitoring
· Environmental and work
protection
· Sound design:
· Noise diagnosis
· Product optimization
Features HMS IV.0
Mounting Platform
At the top of the HMS IV.0 head, a
mounting platform with a screw thread
is provided, which can be used to mount
and adjust various hardware extensions.
For example, a laser pointer for an exact
positioning of the HMS IV.0 can be
attached.
The CompactFlash slot on the front side of the HMS IV.0 is easily accessible
CompactFlash
Battery
Recordings can be saved directly to a
CompactFlash card and played back
from the card. The CF slot in the front
side of the shoulder unit is easily accessible, so the card can be easily replaced.
The mains-independent power supply
via a rechargeable battery allows for
high mobility and makes the HMS IV.0
ideal for mobile use.
USB Interface
Alternatively, recordings can be saved
in the familiar way directly to a notebook
or PC via the USB 2.0 (full speed) interface.
Analog Output
With its analog output, the artificial head
can also be operated in combination
with analog measurement systems.
The battery level can be polled at any
time, for example, via the RC VI remote
control.
Playback
Via the headphone output on the back
side of the HMS IV.0, a direct and
aurally accurate playback of audio signals is possible, e.g. with the dynamic
headphones HD IV.1 or HD IV.2. The
playback level is adjusted.
Since the analog output signal is generated from the digital signal, the advantages of the digital signal equalization
are maintained.
Pulse Inputs
The HMS IV.0 electronics allows RPM
pulses to be recorded on to the digital
signal via two pulse inputs. For electrical
isolation, an adapter is available. For
the signal conditioning, auxiliary devices
- PSB II, HSB IV - can be used.
External Synchronization
Via the AES/EBU input, the artificial head
can be synchronized to an external sampling rate. This function is essential for
combining several digital artificial head
measurement systems or for the connection to other digital systems supported
by HEAD acoustics.
Automatic System Check
The HMS IV.0 automatically performs an
extensive system check, during which all
components in the signal path are
checked for proper function. This makes
sure that possible errors or failures in the
measurement chain are detected. Deviations from predefined tolerance ranges
are corrected automatically.
Compatibility
The HMS IV.0 is compatible with the
artificial head measurement systems of
the HMS III generation.
Four-channel Recordings
Dynamic Range
The artificial heads of the HMS IV generation are characterized by a dynamic
range comparable to that of the human
ear. This allows sound events to be
recorded just as a person would hear
them if the person was in the same
position as the artificial head during the
recording.
02.2010 D1500e4
Mounting platform on the HMS IV.0
Direct playback with the dynamic headphone HD IV.1
Equalization
Five different equalization types can be
selected: linear (LIN - no equalization),
independent-of-direction equalization
(ID), free field equalization (FF), diffuse
field equalization (DF) as well as a userdefined equalization setting (USER),
which can be tailored to specific needs.
subject to change
With two HMS IV.0 units, four-channel
recordings are possible with sampling
rates up to 88 kHz. The compatibility of
the HMS IV.0 also allows four-channel
recordings in connection with other front
ends.
Like all other functions of the HMS IV.0,
four-channel recordings in stand-alone
operation can be (remotely) controlled
via the RC VI and saved to a CompactFlash card.
Standard Delivery Items
Accessories
· HMS IV.0
(Code 1500)
Digital Artificial head measurement
system with CompactFlash and USB
interface
· PSH I.1
(Code 1364)
External power supply
· HCF IV.4
(Code 1599-4)
CompactFlash card for HMS IV,
4 GB
· PCC 1.9x
(Code 997x)
Mains cable (local specification)
· CUSB II.1.5
(Code 5478-1.5)
Cable USB 2.0, 1.5 m (4.9 ft)
· CXX II.3
(Code 5177-3)
Cable AES/EBU, 3 m (118“)
· HEAD Tools setup CD, including
HEAD Audio Recorder and HMS
Remote Control
· HSC IV
(Code 1524)
Carrying case for HMS IV.0
· Equalization CD
· Manual
Accessories - hardware
· RC VI
(Code 1966)
Remote control for HMS IV.0
(Bluetooth adapter and PDA)
· TLP
(Code 1967)
Triaxial laser pointer for HMS IV.0
· SBH I
(Code 1315)
Stand base for HMS IV.0
· Pulse adapter (for electrical
isolation of the pulse inputs)
· HTB V
(Code 1374)
HEAD Torso Box for HMS IV.0
· CF card reader (USB 2.0) for transferring the card contents to a PC
· HWS II
(Code 1960)
Windshield for outside recording
· HMT II
(Code 1962)
Tripod for HMS IV.0
For more information on other
supported CF cards please contact
your sales representative.
Recommended headphones
· HD IV.1
(Code 2380)
dynamic headphone (open headphone)
· HD IV.2
(Code 2481)
dynamic headphone (open headphone)
· HD 25-1 (70 Ohm) from Sennheiser (closed-back headphone for
offering high attenuation of background noise
· HD 280 pro from Sennheiser
(closed-back, circumaural headphone for use in a high-noise
environment)
· QC 2 Quiet Comfort from Bose
(closed-back, circumaural headphone with ActiveNoise - Control
Technology)
Technical data – HMS IV.0
Measuring components
Nom. SPL (selectable):
Headroom (electrical):
Equalization modes:
84 dBSPL, 94 dBSPL, 104 dBSPL, 114 dBSPL, 124 dBSPL, 134 dBSPL, 144 dBSPL
6 dB (except for range 144 dB)
Linear (LIN - no equalization), Independent-of-Direction (ID), Free-Field (FF),
Diffuse Field (DF), User-specific (USER)
Corresponds to the structurally-averaged directional pattern of the human outer
ear to IEC 959
½” electrostatic microphones, 200 V polarization voltage
Highpass (passive) 1st order, switchable 22 / 180 Hz (±10 %); highpass
(active) 2nd order, 22 Hz (±10 %), all filters can be deactivated
20 Hz - 20 kHz: ±0.15 dB; 3 Hz - 20 kHz: -3 dB/+0.1 dB; electr.,
without equalization
145 dBSPL (< 3 % distortion factor)
24 Bit, oversampling 256-fold (fS < 50 kHz), 128-fold (fS > 50 kHz)
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
(internal and external synchronizable via AES/EBU 32 kHz - 96 kHz)
Directional pattern:
Type of microphones:
Filters:
Transmission range:
Max. SPL:
Resolution:
Sampling rate:
Range:
94 dBSPL
Inherent noise
acoust., typ. LIN, HP off:
134 dBSPL
144 dBSPL
15,5 dBSPL (A) 16 dBSPL (A) 16 dBSPL (A) 17,5 dBSPL (A)
24 dBSPL (A)
34 dBSPL (A)
S/NFS, acoust., typ., LIN:
84,5 dB (A)
116 dB (A)
111 dB (A)
Inherent noise
acoust., typ., ID, HP1 on:
13,5 dBSPL (A) 14 dBSPL (A) 14,5 dBSPL (A) 17 dBSPL (A)
24,5 dBSPL (A) 34,5 dBSPL (A)
-77 dB
(0,013%)
THD+N
electr., typ., Sin 1 kHz, 0 dB, LIN:
CrossTalk
electr., typ., Sin 1 kHz, 0 dB, LIN:
Linearity
electr., typ., at 1 kHz, narrow-band:
02.2010 D1500e4
subject to change
104 dBSPL
94 dB (A)
114 dBSPl
104 dB (A)
124 dBSPL
112,5 dB (A)
-87 dB
(0,0045%)
-93 dB
0,0022%)
-87 dB
(0,0045%)
-74 dB
(0,02%)
-119 dB
-122 dB
-122 dB
-121 dB
-107 dB
109 dB
120 dB
122 dB
130 dB
Technical data – HMS IV.0 (continued)
CompactFlash:
Supported CF card:
e.g. CompactFlash card for HMS IV, 4 GB
Analog Out (Multifunction)
Nom. output level:
1 Vrms + 6 dB Headroom
Inherent noise, typ.:
S/N: 98 dBFS (+ 0 dB)
Intermodulation (THD+N), typ.:
-92 dB at 1 kHz
Headphone Out:
Equalized for HD IV.1 (HEAD acoustics), HD 25-1 - 70 Ohm (Sennheiser), HD 280
pro (Sennheiser), QC 2 Quiet Comfort (Bose); Line Out ist deactivated if a headphone
is plugged in
Max. SPL, typ.:
116 dBSPL (LIN) - with HD IV.1
Dynamic (S/NFS), typ.:
> 100 dB (A)FS
Digital Out:
AES/EBU, IEC II subcode selectable; 24 bit format; 16 bit format, noise shaping
activable
USB interface:
To specification rev. 1.1. Compatible to USB 2.0 full speed;
enables 2-head recordings up to 48 kHz (24 bit) and 96 kHz (16 bit)
Operation:
HEAD Recorder and HMS Remote Control (via RS 232 and USB),
Remote Control RC VI (Bluetooth) oder RC V (RS 232)
System check:
Automatic hardware check for digital and analog component and A/D converter after
power on
Pulse In:
Limit frequency: fS/2, 35 kHz max., TTL-compatible, Inputs not elect. isolated;
with adapter for electr. isolation (standard delivery items): 10 kHz TTL, 50 %
Power Supply:
Interruption-free switching between external and internal power supply. Smart charge
electronics
External DC Supply (typ.):
10 - 18 V, max. 34 V, vehicle on-board power supply or power pack
Internal DC Supply:
Battery NiMH, 12 V, 3.7 Ah (without memory effect)
Current, Output
Charging:
Quick charging 4.5 h max., transition to pulsed trickle charging
Operating time with battery:
3 h (typ.) at recording to the CF (with remote control)
8 h (typ.) at recording via USB to the HD
Environmental conditions:
Operating temperature range: 0° C - 50° C (32° F - 122° F)
Storage temperature range: -20° C - 70° C (-4° F - 158° F)
Thread mounting platform:
M6
Tripod socket:
UNC 3/8“
Dimensions (WxHxD):
450 mm x 400 mm x 180 mm (18.31“ x 15.75“ x 7.09“)
Weight:
5.65 Kg (12.46 Ib)
Radiated emission according to: EN 61326-1: 1997 + A1: 1998 + A2: 2001 + A3: 2003 (equipment class A)
Radiated immunity according to: EN 61326-1: 1997 + A1: 1998 + A2: 2001 + A3: 2003
Safety according to: EN 61010-1: 2001
Physical dimensions of the head designed according to ITU P 58, section 4.2 and comparable to ANSI 3.36, table 1 and IEC
959, table 1.
Please note: Without torso box, some dimensions in P.58, table1 are not applicable.
The monaural frequency responses comply with ITU P 58, table 4 and to those that can be derived from ANSI 3.36, table 3 and
IEC 959, table 3.
External Power Supply PSH I.1
Input voltage:
100 V - 240 V AC, 47 Hz - 63 Hz
Max. input current:
1.6 A at 100 V AC
Output voltage/current:
15 V DC / 4 A to XLR (4-pin)
02.2010 D1500e4
subject to change