DE19852805A1 - Telephone with improved speech understanding, several microphones, and special speech signal processing - Google Patents

Abstract

Several microphones pick-up the speech signal of a corresponding subscriber and/or the background interference noise, then follows linking or computing by analog and/or digital speech and tone signal processing algorithms. The processed signal is transmitted to further subscriber, or to called subscriber. An analog and/or digital, level matched and frequency course equalised signal prod. of the processed speech signal and similarly processed background signal, phase-shifted through 180 deg., is mixed with the transmitted or received speech signal of further subscriber. Then it is supplied to the earset and/or loudspeaker of the speaking subscriber.

Description

The invention relates to a telephone with improved speech intelligibility at least two microphones and a created, special speech signal Processing from this plurality of microphone sound signals.

It is known that mobile phones, wireless phones or cell phones in noise polluted environment insufficiently capture the useful voice signal and Bring transfer. In addition to the background noise, the Digitization of the spoken sound signal "modulated-whispering" effects of vocal-tonal and, for speech intelligibility, time variant Harmonics and hissing noises. Furthermore, for the mobile phone user in the said noise-affected environment is also a bad, i. H. noise-concealed speech signal intelligibility to the other or selected Speakers given over the small speaker built into the cell phone. This In this context, acoustic effects have no cause in one low radio frequency signal reception; see. Mobile phone transponder with sufficient performance near a telephone.

It is already known from the 1930s that "anti-noise addition" to the original sound signal, according to a sound signal structure transformed by 180 degrees represents compared to the original sound signal, an active noise compensation z. B. in Airplane pilot headphones or similar environments affected by noise Can realize signal addition. That is, for example, that the original sound signal or Useful signal a 180 degree phase-shifted admixture that was recorded via a microphone Interference signal etc. suitably frequency-dependent leveled via loudspeaker is played. In addition, microphone matrix arrangements are in Motor vehicle interiors or in ventilation ducts (conference of the Germans Working group for acoustics, DAGA 1997, conference proceedings, page 199 ff., R. Schirmacher ed al.) And the said active noise compensation usus.

Furthermore, today one is able to use the articulatory models that have now been modeled Language parameters, which for each word etc. a significant, time variant Spectrum envelope offered in speech synthesis and speech synthesis systems to integrate; see. not via keyboard but articulative speaking Text input created for / on a PC word processing program (e.g. above. DAGA conference 1997, page 614 ff, B. J. Kröger).

Finally, a patent DE 196 33 292 is to be mentioned, which by means of two Loudspeaker in the earpiece the u. a. volume-related listening quality of a Handappartes, cordless phones, etc. should improve. This is against this Basic ideas of the invention, only for reasons of speech intelligibility Listening volume of the telephone useful signal to be raised compared to the interference signal; Keyword hearing damage caused by higher, to be considered psychoacoustically  Long-term sound / speech signal level.

The present invention has the task of the aforementioned speech intelligibility of the two telephoners, d. that is, the transmit and receive voice signal of the mobile telephoners and the reception voice signal of the other Telephoners at the other end of the telephone transmission line from Ambient interference noise with the characterizing features of claim 1 to upgrade. It is a modified with several microphones Mobile phone or cell phone, which is used, so mainly computer-based Signal processing the large number of microphone signals a noise-free Voice signal and noise reduction generated on the mobile phone speaker.

Further explanations are shown in the subclaims: Claims 2 to 5, the special speech and noise detection microphones or -Additional microphones and their placement on / described in the mobile phone. In the Claims 5 and 6 set out a measurement and control loop, which the appropriate selection of noise microphones during ongoing telephone operation easier. Claims 7 to 11 create an extraction of speech and Noise microphone signals that otherwise only exist in the mobile phone with one microphone are heard or transmitted together and consequently a useful signal too Noise level increase would bring. In addition to signal evaluation as well Signal mixes focus on audio signal delays. In the Claims 12 to 14 are subject to the actual noise signal parts Marking and recognition procedure with priority decision, to what extent that Noise-reduced real-time speech signal related to spectral noise or Speech signal pattern-related is subjected to noise suppression. The Claim 15 sets out the essential procedure for noise reduction of the based on noise-reduced speech useful signals. The transfer or Transmission of the noise-wide voice signal to the external, further Telephone partner (at the other end of the telephone line) and for eavesdropping / listening Loudspeaker on the Moiltelefon is disclosed in claim 16. Claims 17 and 18 describe the procedures for noise reduction on the mobile phone Speaker. Other sound reproduction and tone color optimization algorithms, such as also the harmonic / harmonic regeneration to extend the transmission range, show claims 19 and 20. A comparison option with and without speech signal improvement procedures or measure according to the invention Claim 21 open. With claims 22 and 23 there is a Telecommunication lines or connection channels going beyond Independent external connection and reciprocal send / receive option of extreme data (transceivers) and signals. This is expanded mobile phone according to the invention also by multimedia / fax / voice synthesis Resynthesis / language translation functions by claims 24 to 26, wherein takes into account the needs of a disabled person (e.g. blind or deaf) are. Furthermore, the mobile phone in question offers an option to control, regulate, Operating, information signals in acoustically verbalized information too  transform or reproduce what is shown in claims 27 and 28. Consequently, the mobile telephone use according to the invention is not only at one location, but also in terms of the user levels offered today and by the physical degrees of freedom of a user (see here physical disabilities reduce this) unbound "mobile". In claim 29 all are subject speech signals received or pending for sound reproduction and transmission an intoxication or denoiseing. Finally, by claim 30 that is electrical powered mobile phone from the perspective of electromagnetic environmental Compatibility in the physical field as well as field effects on humans etc. optimized in relation to measures.

The invention is explained in more detail below with the aid of two drawings, it shows:

Fig. 1 shows a typical mobile phone with the inventive positioning of the voice and noise microphones and the usual accessories of such a phone.

Fig. 2 shows a simplified signal flow diagram in a block diagram of the inventively improved speech signal processing procedures or algorithms.

In Fig. 1, the reference numeral 1 designates the wireless mobile phone, 2 a receiving antenna for modulated transmitted high-frequency telephone signals, 3 the location of a telephone listening speaker, 4 the positioning of a speech or voice-in microphone and a nearby background noise microphone, 5 the modern, In particular, mobile phones are essential accessories for an operating keyboard, 6 a display for recognizing current mobile phone working conditions, 7 and 8 (with reference to a front view of a mobile phone), background noise microphones on the top right and bottom, 9 a background on the bottom - Noise microphone, 10 and 11 left-hand side bottom and top background noise microphones, 12 top-side background noise microphone and 13 rear-mounted background noise microphone.

In FIG. 2, reference numeral 14 denotes the signal exchange or the telephone transceiver operation of a telephoning or telephoning subscriber with a further telephoning subscriber whom the telephoner contacts with reference to the use of the mobile telephone according to FIG. 1 and thereby uses the signal processing algorithms or flows with the reference numerals 17 to 25 . In detail, therefore, furthermore 2, reference numeral 15 designates, in Fig. Emitted to be transmitted speech signal for further telephoning party (the usual manner via the antenna / air and electromagnetic field transmission, and the modulated high-frequency signals), 16 the transmitted-received (see Fig. Antenna / Figure . 1, item 2) speech signal further telephoning operator 17 a speaker, and its sound conversion in a (mobile) telephone or Hörsprech-set, 18 is a 180 degree phase shift of the existent in the background disturbing sound / noise signal 19 , 20 an analog / digital (see also abbreviations "ana. O. Dig" which means "analog or digital") signal flow or signal flow direction in the speech signal improvement procedure according to the invention, 21 the pure or interference noise achieved by the speech signal improvement procedures exempted speech useful signal, 22 the heart of the speech signal improvement by means of digital data processing and / or analog Sound / speech signal processing, 23 the speech microphone and its recorded sound signal information, consisting mainly of speech signal parts, 24 up to nine analog or digital signal paths or sound / noise signal feeds for sound / data processing ( 22 ), which of the up to nine noise / background noise microphones 25 are fed.

The realization of the invention is predetermined analog or digital or analog and / or digital. Here 1 shows a known mobile phone or mobile phone 1 is shown in FIG modified. The for the conventional high-frequency signal receiving and -Signalaussendungn necessary antenna 2, a speaker 3, a first, here called speech signal input microphone 4, the telephone operating keyboard 5 and the display for viewing the telephone function / action state 6 is known to belong to the prior art and here to the basic device of the mobile phone. According to the invention, this is now supplemented with, viewed from the front, top and bottom right, top left and bottom, on the lower stand area, the head side, the back and in the vicinity of the actual speech microphone 4 , another 8 interference noise detection microphones (on / at ) 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 . The keyboard 5 is used to select which and the number of these background noise microphones are now active. This is empirically or iteratively fixed or automatically self-regulating (see FIG. 2, by 22 ), since the frequency-dependent level ratios of the noise microphones are shaped by the direction of the noise / interference noise (depending on the respective telephone location and location). That is, that z. B. with a background noise in a football stadium, all 8 noise microphones may be activated, but in a railroad train station with a train squeaking in from (viewing direction, etc.) on the right, facing the noise source, top right and bottom and on the back of the cell phone located noise microphone is activated (this is selected by hand, static or self-regulation via voice signal processing, as shown in FIG. 2, plus measurement / control feedback). Impulsive noise components from other directions, i.e. according to the example of the incoming train, can, but do not have to be taken into account when selecting the noise microphones; In automatic microphone selection mode, this microphone-on function can be called up at any time via a noise gate radio (among other things, can be called up for impulse noises from different directions to the relevant "continuous noise component" and otherwise / possibly hidden mixed). In the case of a complicated, noise-signed voice signal, double billing of the voice input signal in the mobile phone subarea 4 is more effective in the present case, which is why, in addition to the actual voice input microphone 4, an equivalent, position-related noise microphone is activated.

According to the invention, the following algorithms and procedures, which are shown in FIG. 2 and which optimize speech intelligibility, are also in the foreground: In a telephone call of the mobile telephone user with another person (or telephone subscriber), the speech received signal 16 can be heard via the loudspeaker 17 . As required, like all other audio signals (see later, processed, phase-shifted noise and the own, coupled voice-only signal of the mobile phone user), it is subject to level / time / frequency-dependent correction for better speech dialogue understanding (see speech intelligibility at suitable frequency response etc. optimized). This preferably relates to possible additional harmonic and harmonic regenerations by so-called exciting functions, expanding the band bass transmission range of the telephone (300 Hz to 3.4 kHz) and z. B. higher-frequency sibilants in speech intelligibility benefit. The detected by the voice microphone 23, noise-afflicted speech signal is a signal processing 22 electrically connected 24 supplied to the analog-to-digital conversion needs in dependence of an analog or digital signal power of 22 and pretends. In the same way, this also happens with the sound microphone signals (on / at) 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 . A later digital-to-analog conversion before the actual voice / sound signal reproduction via loudspeakers 3 , 17 is also taken into account in digital signal processing. All incoming microphone signals are subject to (among other things, digital Fourier processing) a Fast Fourier transformation, etc., as well as time / frequency level signal analysis with subsequent, respective and / or summation signal control. Among other things, in the case of more complex, noise-distorted speech signals, a parallel calculation (digital data processing) of the present voice microphone signal plus the nearby (activated) noise-microphone signal and the noise-microphone signal complexl sum. Likewise, the same applies to a time-shortened extraction of the speech signal, which is freed from background noise, and special background noise parts. These are in turn marked in the computer-related comparison of stored voice signal patterns (in particular non-tonal, low-frequency signal components) with the noise-reduced voice-reduced signal and / or divided by a time-related, spectrally-adjusted subtraction of the two useful and interference signals. It should be said that the reproduction of (noise) signals towards lower frequencies (see above, below 300 Hz) benefits the low-frequency head-near-field noise compensation (see below) and is taken into account according to the invention. The marking of noise components is done by means of

• a) Envelope scan of both speech and noise signals, the Noise predominantly / usually at a lower level Frequency patterns appear imprinted on the speech signal (see concealed mouth Voice microphone and open or open noise microphones) and / or
• b) simultaneous, digital comparison of real-time voice usage signal patterns / parties with specially stored in the fixed memory of the mobile phone unit Speech signal patterns, which are framed in time structure and spectral correlation brought and / or
• c) a logical priority decision in the event of inequality between a) and b) to select one or the other signal pattern marker.

Here are those specified by the different microphone locations Distances, which are signal delays between the voice and the Display sound microphones, using sound microphone delays (based on the Voice signal; is the reference location). Likewise, those are by hand / Body / cellphone occlusion generated resonances and diffractions in time-frequency Patterns of the single tone signals recorded, which with the noise microphone mixing with enter or equalized and / or by switching off ineffective, predominantly distorting noise microphones are eliminated or eliminated (see above, static or automatic noise microphone selection).

For example, if the mobile phone speaker sings a melody to the other subscriber (on the other end of the line), a 574 Hz tone is sung and an above-mentioned train is trying to cover up this tone with a whistling sound at 1.1 kHz, this tone will be used calculated solely from the speech signal-atypical signal pattern type of the (sum) noise microphone signal or subtracted from the useful signal and 180 degrees phase-shifted 18 and frequency response and time dynamically mixed to the loudspeaker signal 17 (possibly with received-transmitted speech signal 16 ). Here models of psychoacoustics, such as pre- and post-masking, are taken into account. In the other, exemplary, more complex football stadium noise case, there are statistically scattering signal parts which may come close to a breathier voice, the sibilance of an "F", etc., but are recognized by the language-typical flank patterns of the sibilance. That is., That, firstly, the voice pattern recognition (Comparative Reatime- with stored voice pattern data), and secondly, the identity or plurality of in comparison to Sprachnulzsignal 23 detected Störhindergrunds-Geräuschsinalen 25 detects the noise batches of 23 or (unmasked this dynamically computing Zeitverzügerung of a few 0.1 to 10 milliseconds of the sound signals; see reference of the speech signal microphone / position). As already mentioned, there is an analog or digital subtraction of the voice signal from the marked noise signal (by means of a 180 degree phase rotation 18 and then to the loudspeaker feed 17 ); corresponds to the noise-free, "pure speech signal" 21 . The non-phase-shifted, noise-free voice signal 21 is transmitted in analog or digital form to the other telephone subscriber by 15 .

All frequency-dependent, time-dynamic level relationships are subject to a selectable and / or automatic measurement feedback and regulation loop, which suppresses clipping, whistling feedback, speech signal compressor expander functions and speech signal frequency response corrections (in addition, see above: paragraph on exciting -Functions of the voice signal, among other things). The latter is rather supported by targeted-controlled generation of sound by means of the phase-shifted 18, time-dynamic admixture of the marked background noise 19 to the overall loudspeaker signal 17 , which is for the close-to-head noise on the mobile phone ear or on the loudspeaker of the mobile phone user or on the other side A little less ear, a near-field noise level reduction creates and thus creates a better, binaural psychoacoustic speech intelligibility (an ear does not have to be closed).

Furthermore, all real-time speech signal transmit / receive paths are subject to one Echi time signal comparison investigation on statistical signal fluctuation processes, how they occur with so-called noise. These noise signal components are calculated or subtracted after computer-aided detection (see procedure for denoiseing old, noisy recordings via PC).

All speech signal intelligibility procedures or functions are optional bridgeable, what u. a. is solved by STAND-BY activation. This is a comparison with and without mobile phone exposure according to the invention.

According to the invention, the mobile telephone contains further functional additions: on the one hand, an interface or interface is attached near the microphone 9 (according to FIG. 1). This allows bi-directional data exchange with external devices, such as multimedia, fax transceiver, voice synthesis resynthesis systems or printers, not via the existing telephone connection (see e.g. DMA and / or RS32 / parallel interface). This is supplemented by the variant of being able to guarantee tactile data input / output for disabled people. In addition to software support in the mobile phone for the above-mentioned phone extensions, the keyboard 5 of the mobile phone is provided with embossed blind reading letters or characters (cf. Braille). In addition, the speech signal synthesis resynthesis can also be selected so that all incoming (received), spoken dialogues of the other telephone subscriber or one's own (transmitted), visible or audible (via the loudspeaker 3 , 17 ) are translated and / or on request for deaf people in general on the display (display field 6 ) and / or via the interfaces to external devices. This means that any speech / dialog-to-speech signal conversion (acoustic to signal-related information and vice versa) can be traced back and forth in any language. This also includes all information, operating, control and regulating signals that are made visible and / or audible, inter alia, for the disabled (can be selected if required).

Finally, on the mobile phone according to the invention, the connection, installation and Application of physical measures as well as alternative measures against the effects of electromagnetic fields. this concerns Shielding against existing alternating field dispositions and the above. described consideration of so-called electrical stress relief systems Florian M. König, which is mainly based on such a system or element use natural mineral and metal structure arrangements.

Claims (30)

1. Telephone with improved speech intelligibility, characterized in that at least two microphones detect the useful voice signal of an opposing telephone subscriber and / or the background noise and additively and / or sutractively link or by means of analog and / or digital speech signal and sound signal processing algorithms or calculate and this processed speech signal is transmitted to the further telephone subscriber or the called party and an analog and / or digital level-adapted, frequency response-equalized signal product from this processed voice signal and a 180-degree phase-shifted, likewise analog and / or digital frequency response equalized Background noise is mixed with the received voice signal of the other telephone subscriber and is brought to the speaking telephone subscriber by headphones and / or loudspeaker sound system. 2. Telephone with improved speech intelligibility, with a special microphone arrangement, according to claim 1, characterized in that at least one microphone ( 4 ) at the position typical for telephones or telephone hearing sets ( 1 ) ( 4 ) for voice input and at least one Another microphone for recording the background noise at a different position ( 7 , 8 , 9 , 10 , 11 , 12 , 13 ) is introduced. 3. Telephone with improved speech intelligibility, with a special microphone arrangement, according to claim 2, characterized in that preferably up to 9 noise microphones ( 7 , 8 , 9 , 10 , 11 , 12 , 13 ) on all sides or side surfaces and edges of the Phones ( 1 ) are introduced. 4. Telephone with improved speech intelligibility, with a special microphone arrangement, according to one or both of claims 2 and 3, characterized in that one of these plurality of noise microphones is placed in the immediate vicinity of the speech input microphone ( 4 ). 5. Telephone with improved speech intelligibility, with a special microphone selection, according to one or more of claims 1 to 4, characterized in that one or more of the noise microphones ( 7 , 8 , 9 , 10th ) by pressing a key of the selection keypad ( 5 ) , 11 , 12 , 13 ) are activated or a time-variable, automatic self-selection of one or more activated noise microphones is specified. 6. Telephone with improved speech intelligibility, with microphone signal measuring and control loop, according to one or more of claims 1 to 5, characterized in that by means of the microphones ( 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ) detected voice signal and background noise is subject to a bi-directional, that is to say in a feedback control loop, analog and / or digital speech signal and sound signal processing. 7. Telephone with improved speech intelligibility, with special microphone selection and Microphone signal measuring and control loop, according to one or both of claims 5 and 6, characterized in that the time-variable, automated self-selection of Noise microphones that always appear differently Direction of incidence in the form of connected, different maximum values and / or Maximum level values in the received time variants of the noise microphone signal Spectra recorded psychoacoustically evaluated and as a mixed sound signal microphone index for evaluating and / or the noise microphone signals fading in or out is based. 8. Telephone with improved speech intelligibility, with special microphone signal processing, according to one or both of claims 6 and 7, characterized in that the individual microphone signals when selecting several sound microphones ( 7 , 8 , 9 , 10 , 11 , 12 , 13 ) , including the speech microphone signal, to which speech signal processing is fed individually and, in parallel, a special mixture ( 22 ), with reference to the psychoacoustic evaluation by the noise microphone signal mixed index, which generates individual noise microphone signals to form an overall noise microphone signal. 9. Telephone with improved speech intelligibility, with special microphone signal processing, according to one or more of claims 5 to 7, characterized in that the time-variable switching between one or more noise microphones ( 25 ) in the resulting overall noise signal ( 19 ) abrupt signal switching edges avoids and provides with a possible, steep changeover signal flanks smoothing, frequency-dependent level transition flat flank or mixes from state A to B smoothly to equalize the level. 10. Telephone with improved speech intelligibility, with special microphone signal processing, according to one or more of claims 7 to 9, characterized in that the special mixture ( 22 ) of the noise microphone signals ( 25 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ) in particular microphone-related level differences, frequency response diffraction, resonances due to obscuration of objects and also associated reflections, with specification of the distance ratios of all microphones ( 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ) to one another and in particular with regard to the speech signal microphone ( 4 , 23 ) counteracted and, depending on the microphone signal, receives distance-related audio signal delays. 11. Telephone with improved speech intelligibility, with special microphone signal processing, according to one or more of claims 7 to 10, characterized in that the respective delay times of the respective sound paths of the noise microphones ( 7 , 8 , 9 , 10 , 11 , 12 , 13 ) and / or with each other with all microphones, with respect to the speech signal microphone specified as the reference location ( 4 ), according to a simultaneous pulse signal input at the reference location ( 4 ) analog and / or digital. 12. Telephone with improved speech intelligibility, with detection of the background noise signal parts or signal portions, according to one or more of claims 1 to 11, characterized in that the background noise-reduced speech useful signal by an edge pattern and / or envelope and / or spectrum -Comparison procedure ( 22 ) with analog and / or digitally correlated with noise microphone signals that are predefined for dynamic dynamics or in real time and / or stored predefined speech signal patterns. 13. Telephone with improved speech intelligibility, with detection of the Background noise signal portions or signal portions, according to claim 12, characterized in that the envelope and / or spectral-related detected level and / or time-variant background noise deviating from the voice signal Signal components related to level and / or time and consequently if the time-related speech signal spectrum-speech pattern comparison by a computer logical priority decision are marked. 14. Telephone with improved speech intelligibility, with detection of the Background noise signal portions or signal components, according to claim 13, characterized in that the marking of the background noise background in a comparison of the majority and / or equality of similar overall Noise microphone signal lots and / or the individual noise microphone signal Games and the differing noise-reduced voice useful signal is determined. 15. Telephone with improved speech intelligibility, with speech signal interference noise exemption, according to one or more of claims 12 to 14, characterized in that the level and / or time-related marked noise signal portions ( 19 ) of the background noise-reduced voice signal ( 23 ) are subtracted in an analog and / or digital manner and as the signal component or product creates the background noise-free speech useful signal ( 21 ). 16. Telephone with improved speech intelligibility, with transmission or reproduction of the noise-free speech signal, according to one or more of claims 12 to 15, characterized in that the background noise-free speech useful signal ( 21 ) with 0 degrees phase shift for transmission ( 15 ) to the other telephone subscriber ( 14 ) and, in the sense of listening in on the loudspeaker ( 3 , 17 ), your own voice or voice articulation at a lower level typical for the telephone to the received and loudspeaker-owned ( 3 , 17 ) voice signal of the other telephone Participant ( 14 ) is mixed. 17. Telephone with improved speech signal intelligibility, with dynamically controlled noise reduction on the telephone loudspeaker, according to one or more of claims 12 to 16, characterized in that the marked noise areas ( 19 ) and / or the background noise signals ( 25 ) and / or that Total noise microphone signal 180 degrees phase-shifted ( 18 ) to the received speech signal ( 16 ) from the additional telephone subscriber ( 14 ) and the noise-free speech useful signal ( 21 ) mixed and adjusted to level together and frequency response equalized by telephone loudspeaker ( 3 , 17 ) is reproduced. 18. Telephone with improved speech intelligibility, with dynamically regulated Noise reduction on the telephone speaker, according to claim 17, thereby characterized that the level and frequency response influence the 180 degrees added interference signals of a time-frequency range dynamic Feedback measuring loop and / or feedback sensor feedback control or Oppression is subject. 19. Telephone with improved speech intelligibility, with sound reproduction optimization, according to one or more of claims 1 to 18, characterized in that the feedback measuring loop, the level relationships of all microphone signals ( 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13th , 23 , 24 ) with the levels of the voice useful signal ( 21 ) and the loudspeaker sound pressure ( 3 , 17 ), recorded dynamically as a function of the frequency. 20. Telephone with improved speech intelligibility, with timbre reproduction optimization, according to claim 19, characterized in that by means of the dial pad ( 5 ) of the telephone ( 1 ) different static and / or time-dynamic frequency range equalizations and / or filters are provided, which supplement the usual telephone hearing frequency range from 300 Hz to 3400 Hz with harmonic and / or harmonic regenerations or exciting functions or extend them in terms of frequency range. 21. Telephone with improved speech intelligibility, with the possibility of comparison with and without speech signal processing measures, according to one or more of the Claims 1 to 20, characterized in that all functions of the speech signal Processing or optimization, which is selected primarily via the keyboard or can be operated in a STAND-BY state, i.e. bridging mode are switchable. 22. Telephone with improved speech intelligibility, with telephone-external signal / data exchange, according to one or more of claims 1 to 21, characterized in that all analog and / or digital transmit / receive signals ( 15 , 16 ) of the transmission link ( 14 ) and / or those tactile ( 5 ) or electroacoustic ( 4 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ) signals generated by the telephone ( 1 ) an analog and / or digital interface suitable for mono / bi / unidirectional data exchange or interface ( 14 ) are supplied. 23. Telephone with improved speech intelligibility, with telephone-external signal / data exchange, according to claim 22, characterized in that the interface or the interface ( 14 ) preferably on the back of the mobile phone or laterally near the noise microphone ( 9 ) for one immediate and direct external device connection is provided. 24. Telephone with improved speech intelligibility, with extensions for mobile office use and handicap operating accessories, according to one or both of claims 22 and 23, characterized in that a multimedia data exchange, a fax transmission-reception operation, a speech signal synthesis resynthesis, a printer output and a tactile data input for the disabled are also provided with blind-read letters or characters embossed on the keys ( 5 ) of the mobile telephone ( 1 ). 25. Telephone with improved speech intelligibility, with extensions in multimedia and speech synthesis use, according to one or more of claims 1 to 24, characterized in that the multimedia data exchange, the fax transmission-reception operation, the speech signal synthesis resynthesis and the tactile data input can be selected with the aid of software ( 1 ) within the mobile phone. 26. Telephone with improved speech intelligibility, with extensions for one Multi-language use, according to one or both of claims 24 and 25, thereby characterized in that the speech signal synthesis resynthesis spoke a Selectable language translation for the transmit / receive mode acoustically and / or includes signal-related. 27. Telephone with improved speech intelligibility, with extensions to not visible representation of signals, according to one or more of claims 1 to 26, characterized in that all information and / or operational and / or control and / or regulating signals in or for the telephone transmission Reception mode too audible and / or psychoacoustically audible-verbalized Speech signal information is transformed. 28. Telephone with improved speech signal intelligibility, with extensions to not visible representation of signals, according to one or more of claims 22 to 27, characterized in that certain signals from information areas optionally selected and for acoustically audible voice signal information are transformed. 29. Telephone with improved speech intelligibility, with extensions for noise suppression of speech signals, according to one or more of claims 1 to 28, characterized in that all received and / or to be transmitted or transmitted and / or reproduced speech signals ( 15 , 16 , 21 ) with a computer-based, on / off real-time signal comparison to statistical signal fluctuations, the so-called noise, and these are calculated or subtracted from the speech useful signal ( 21 ) after recognizing the noise signal or residual signal components. 30. Telephone with improved speech intelligibility, with extensions for reduction of electrical stress, according to one or more of claims 1 to 29, characterized characterized in that a connection and / or installation and / or mobile phone Application of systems against the physical and / or physical effects of electromagnetic fields is provided.